Eyematics Core Data Set
2025.0.0-alpha - ci-build Unknown region code '276'

Eyematics Core Data Set - Local Development build (v2025.0.0-alpha) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions

Resource Profile: Visual Acuity (VA) ( Experimental )

Official URL: https://eyematics.org/fhir/eyematics-kds/StructureDefinition/observation-visual-acuity Version: 2025.0.0-alpha
Draft as of 2025-10-18 Computable Name: MII_EyeMatics_VisualAcuity

An assessment of a patients ability to see.

Usages:

  • This Profile is not used by any profiles in this Implementation Guide

You can also check for usages in the FHIR IG Statistics

Formal Views of Profile Content

Description of Profiles, Differentials, Snapshots and how the different presentations work.

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Observation C 0..* MII_EyeMatics_OphthalmicObservation Measurements and simple assertions
Constraints: obs-6, obs-7, iop-laterality
... implicitRules ?!Σ 0..1 uri A set of rules under which this content was created
... modifierExtension ?! 0..* Extension Extensions that cannot be ignored
... status ?!Σ 1..1 code registered | preliminary | final | amended +
Binding: ObservationStatus (required): Codes providing the status of an observation.
.... category:exam S 1..1 CodeableConcept Classification of type of observation
Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.

Required Pattern: At least the following
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... coding 1..* Coding Code defined by a terminology system
Fixed Value: (Complex)
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
...... system 1..1 uri Identity of the terminology system
Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
...... version 0..1 string Version of the system - if relevant
...... code 1..1 code Symbol in syntax defined by the system
Fixed Value: exam
...... display 0..1 string Representation defined by the system
...... userSelected 0..1 boolean If this coding was chosen directly by the user
..... text 0..1 string Plain text representation of the concept
... code Σ 1..1 CodeableConcept Type of observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
.... id 0..0 string Unique id for inter-element referencing
.... extension 0..0 Extension Additional content defined by implementations
.... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
..... id 0..0 string Unique id for inter-element referencing
..... extension 0..0 Extension Additional content defined by implementations
..... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
..... version 0..0 string Version of the system - if relevant
..... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 260246004
..... display 1..1 string Representation defined by the system
Fixed Value: Visual Acuity finding
..... userSelected 0..0 boolean If this coding was chosen directly by the user
.... text 0..0 string Plain text representation of the concept
.... coding Σ 0..* Coding Additional codings
Binding: Visual Acuity Code (preferred)
... subject SΣ 1..1 Reference(Patient) Who and/or what the observation is about
... Slices for value[x] SΣC 0..1 Actual result
Slice: Unordered, Closed by type:$this
.... valueQuantity Quantity
.... valueCodeableConcept CodeableConcept
.... valueString string
.... valueRatio Ratio
.... value[x]:valueRatio ΣC 0..1 Ratio Visual acuity expressed as a Snellen fraction
.... value[x]:valueQuantity ΣC 0..1 Quantity Visual acuity expressed as a simple quantity
..... comparator ?!Σ 0..1 code < | <= | >= | > - how to understand the value
Binding: QuantityComparator (required): How the Quantity should be understood and represented.
..... code Σ 0..1 code Coded form of the unit
Binding: Visual Acuity Units (preferred)
.... value[x]:valueCodeableConcept ΣC 0..1 CodeableConcept Visual acuity expressed as a code
Binding: Visual Acuity Categorial Values (preferred)
.... value[x]:valueString ΣC 0..1 string Visual acuity expressed as a string (discouraged!)
... note S 0..* Annotation Free text note or Comments about the VA observation
... bodySite S 1..1 CodeableConcept Observed body part
Binding: Eye Laterality (required)
.... Slices for coding Σ 1..* Coding Code defined by a terminology system
Slice: Unordered, Open by pattern:$this
..... coding:laterality SΣ 1..1 Coding Code defined by a terminology system
Binding: Eye Laterality (required)
... method 0..1 CodeableConcept VA measurement Method
Binding: VA Methods (preferred)
.... coding Σ 0..1 Coding Code defined by a terminology system
... referenceRange C 0..1 BackboneElement Provides guide for interpretation
Constraints: obs-3
.... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
... Slices for component Σ 0..* BackboneElement Component results
Slice: Unordered, Open by value:code, value:value
.... component:All Slices Content/Rules for all slices
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
.... component:Correction-in-front-of-right-eye Σ 0..1 BackboneElement Component results
..... Slices for extension 0..* Extension Extension
Slice: Unordered, Open by value:url
...... extension:LensDuringVATestSpecification 0..1 (Complex) Extension
URL: https://eyematics.org/fhir/eyematics-kds/StructureDefinition/LensDuringVATestSpecification
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://loinc.org
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 29073-4
....... display 1..1 string Representation defined by the system
Fixed Value: Right eye Position
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Correction Methods (preferred)
.... component:Correction-in-front-of-left-eye Σ 0..1 BackboneElement Component results
..... Slices for extension 0..* Extension Extension
Slice: Unordered, Open by value:url
...... extension:LensDuringVATestSpecification 0..1 (Complex) Extension
URL: https://eyematics.org/fhir/eyematics-kds/StructureDefinition/LensDuringVATestSpecification
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://loinc.org
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 29074-2
....... display 1..1 string Representation defined by the system
Fixed Value: Left eye Position
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Correction Methods (preferred)
.... component:Test-Distance Σ 0..1 BackboneElement Distance of Visual acuity Test
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 252124009
....... display 1..1 string Representation defined by the system
Fixed Value: Test distance
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... Slices for value[x] Σ 0..1 Actual component result
Slice: Unordered, Open by type:$this
...... valueQuantity Quantity
...... valueCodeableConcept CodeableConcept
...... value[x]:valueCodeableConcept Σ 0..1 CodeableConcept Measurement Distance as Coded Concept
Binding: Visual Acuity Test Distance (preferred)
.... component:Optotype-used Σ 0..1 BackboneElement Optotype used
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 0..0 uri Identity of the terminology system
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: Optotype
....... display 1..1 string Representation defined by the system
Fixed Value: Optotype
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Optotypes (preferred)
.... component:Myadrisis Σ 0..1 BackboneElement Component results
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 37125009
....... display 1..1 string Representation defined by the system
Fixed Value: Dilated pupil (finding)
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Performed NotPerformed (required)
.... component:Pinhole-Occluder-used Σ 0..1 BackboneElement Component results
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 257492003
....... display 1..1 string Representation defined by the system
Fixed Value: Pinhole (physical object)
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Used NotUsed (required)
.... component:SpecialVATestingParameters Σ 0..* BackboneElement Component results
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 370115009
....... display 1..1 string Representation defined by the system
Fixed Value: Special Concept
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Special Testing Parameters (preferred)

doco Documentation for this format

Terminology Bindings

Path Status Usage ValueSet Version Source
Observation.status Base required ObservationStatus 📍4.0.1 FHIR Std.
Observation.category Base preferred Observation Category Codes 📍4.0.1 FHIR Std.
Observation.category:exam Base preferred Observation Category Codes 📍4.0.1 FHIR Std.
Observation.code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.code.coding Base preferred Visual Acuity Code 📦2025.0.0-alpha This IG
Observation.value[x]:valueQuantity.​comparator Base required QuantityComparator 📍4.0.1 FHIR Std.
Observation.value[x]:valueQuantity.​code Base preferred Visual Acuity Units 📦2025.0.0-alpha This IG
Observation.value[x]:valueCodeableConcept Base preferred Visual Acuity Categorial Values 📦2025.0.0-alpha This IG
Observation.bodySite Base required Eye Laterality 📦2025.0.0-alpha This IG
Observation.bodySite.​coding:laterality Base required Eye Laterality 📦2025.0.0-alpha This IG
Observation.method Base preferred VA Methods 📦2025.0.0-alpha This IG
Observation.component.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-right-eye.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-right-eye.​value[x] Base preferred Visual Acuity Correction Methods 📦2025.0.0-alpha This IG
Observation.component:Correction-in-front-of-left-eye.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-left-eye.​value[x] Base preferred Visual Acuity Correction Methods 📦2025.0.0-alpha This IG
Observation.component:Test-Distance.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Test-Distance.​value[x]:valueCodeableConcept Base preferred Visual Acuity Test Distance 📦2025.0.0-alpha This IG
Observation.component:Optotype-used.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Optotype-used.​value[x] Base preferred Visual Acuity Optotypes 📦2025.0.0-alpha This IG
Observation.component:Myadrisis.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Myadrisis.​value[x] Base required Performed NotPerformed 📦2025.0.0-alpha This IG
Observation.component:Pinhole-Occluder-used.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Pinhole-Occluder-used.​value[x] Base required Used NotUsed 📦2025.0.0-alpha This IG
Observation.component:SpecialVATestingParameters.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:SpecialVATestingParameters.​value[x] Base preferred Visual Acuity Special Testing Parameters 📦2025.0.0-alpha This IG

Constraints

Id Grade Path(s) Description Expression
dom-2 error Observation If the resource is contained in another resource, it SHALL NOT contain nested Resources contained.contained.empty()
dom-3 error Observation If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4 error Observation If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5 error Observation If a resource is contained in another resource, it SHALL NOT have a security label contained.meta.security.empty()
dom-6 best practice Observation A resource should have narrative for robust management text.`div`.exists()
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()
iop-laterality error Observation Seitigkeit vom LOINC-Code und Seitigkeit von Observation.bodySite müssen übereinstimmen. (Observation.code.coding.where(code='79893-4').exists() implies bodySite.coding.code = '1290041000') and (Observation.code.coding.where(code='79892-6').exists() implies bodySite.coding.code = '79892-6')
obs-3 error Observation.referenceRange Must have at least a low or a high or text low.exists() or high.exists() or text.exists()
obs-6 error Observation dataAbsentReason SHALL only be present if Observation.value[x] is not present dataAbsentReason.empty() or value.empty()
obs-7 error Observation If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

This structure is derived from MII_EyeMatics_OphthalmicObservation

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Observation 0..* MII_EyeMatics_OphthalmicObservation Measurements and simple assertions
... code 1..1 CodeableConcept Type of observation (code / type)
Fixed Value: As shown
.... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
..... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
..... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 260246004
..... display 1..1 string Representation defined by the system
Fixed Value: Visual Acuity finding
.... coding 0..* Coding Additional codings
Binding: Visual Acuity Code (preferred)
... Slices for value[x] S 0..1 Actual result
Slice: Unordered, Open by type:$this
.... valueQuantity Quantity
.... valueCodeableConcept CodeableConcept
.... valueString string
.... valueRatio Ratio
.... value[x]:valueRatio 0..1 Ratio Visual acuity expressed as a Snellen fraction
.... value[x]:valueQuantity 0..1 Quantity Visual acuity expressed as a simple quantity
..... code 0..1 code Coded form of the unit
Binding: Visual Acuity Units (preferred)
.... value[x]:valueCodeableConcept 0..1 CodeableConcept Visual acuity expressed as a code
Binding: Visual Acuity Categorial Values (preferred)
.... value[x]:valueString 0..1 string Visual acuity expressed as a string (discouraged!)
... note S 0..* Annotation Free text note or Comments about the VA observation
... method 0..1 CodeableConcept VA measurement Method
Binding: VA Methods (preferred)
.... coding 0..1 Coding Code defined by a terminology system
... referenceRange 0..1 BackboneElement Provides guide for interpretation
... Slices for component 0..* BackboneElement Component results
Slice: Unordered, Open by value:code, value:value
.... component:Correction-in-front-of-right-eye 0..1 BackboneElement Component results
..... Slices for extension 0..* Extension Extension
Slice: Unordered, Open by value:url
...... extension:LensDuringVATestSpecification 0..1 (Complex) Extension
URL: https://eyematics.org/fhir/eyematics-kds/StructureDefinition/LensDuringVATestSpecification
..... code 1..1 CodeableConcept Type of component observation (code / type)
Fixed Value: As shown
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://loinc.org
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 29073-4
....... display 1..1 string Representation defined by the system
Fixed Value: Right eye Position
..... value[x] 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Correction Methods (preferred)
.... component:Correction-in-front-of-left-eye 0..1 BackboneElement Component results
..... Slices for extension 0..* Extension Extension
Slice: Unordered, Open by value:url
...... extension:LensDuringVATestSpecification 0..1 (Complex) Extension
URL: https://eyematics.org/fhir/eyematics-kds/StructureDefinition/LensDuringVATestSpecification
..... code 1..1 CodeableConcept Type of component observation (code / type)
Fixed Value: As shown
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://loinc.org
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 29074-2
....... display 1..1 string Representation defined by the system
Fixed Value: Left eye Position
..... value[x] 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Correction Methods (preferred)
.... component:Test-Distance 0..1 BackboneElement Distance of Visual acuity Test
..... code 1..1 CodeableConcept Type of component observation (code / type)
Fixed Value: As shown
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 252124009
....... display 1..1 string Representation defined by the system
Fixed Value: Test distance
..... Slices for value[x] 0..1 Actual component result
Slice: Unordered, Open by type:$this
...... valueQuantity Quantity
...... valueCodeableConcept CodeableConcept
...... value[x]:valueCodeableConcept 0..1 CodeableConcept Measurement Distance as Coded Concept
Binding: Visual Acuity Test Distance (preferred)
.... component:Optotype-used 0..1 BackboneElement Optotype used
..... code 1..1 CodeableConcept Type of component observation (code / type)
Fixed Value: As shown
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: Optotype
....... display 1..1 string Representation defined by the system
Fixed Value: Optotype
..... value[x] 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Optotypes (preferred)
.... component:Myadrisis 0..1 BackboneElement Component results
..... code 1..1 CodeableConcept Type of component observation (code / type)
Fixed Value: As shown
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 37125009
....... display 1..1 string Representation defined by the system
Fixed Value: Dilated pupil (finding)
..... value[x] 0..1 CodeableConcept Actual component result
Binding: Performed NotPerformed (required)
.... component:Pinhole-Occluder-used 0..1 BackboneElement Component results
..... code 1..1 CodeableConcept Type of component observation (code / type)
Fixed Value: As shown
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 257492003
....... display 1..1 string Representation defined by the system
Fixed Value: Pinhole (physical object)
..... value[x] 0..1 CodeableConcept Actual component result
Binding: Used NotUsed (required)
.... component:SpecialVATestingParameters 0..* BackboneElement Component results
..... code 1..1 CodeableConcept Type of component observation (code / type)
Fixed Value: As shown
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 370115009
....... display 1..1 string Representation defined by the system
Fixed Value: Special Concept
..... value[x] 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Special Testing Parameters (preferred)

doco Documentation for this format

Terminology Bindings (Differential)

Path Status Usage ValueSet Version Source
Observation.code.coding Base preferred Visual Acuity Code 📦2025.0.0-alpha This IG
Observation.value[x]:valueQuantity.​code Base preferred Visual Acuity Units 📦2025.0.0-alpha This IG
Observation.value[x]:valueCodeableConcept Base preferred Visual Acuity Categorial Values 📦2025.0.0-alpha This IG
Observation.bodySite Base required Eye Laterality 📦2025.0.0-alpha This IG
Observation.method Base preferred VA Methods 📦2025.0.0-alpha This IG
Observation.component:Correction-in-front-of-right-eye.​value[x] Base preferred Visual Acuity Correction Methods 📦2025.0.0-alpha This IG
Observation.component:Correction-in-front-of-left-eye.​value[x] Base preferred Visual Acuity Correction Methods 📦2025.0.0-alpha This IG
Observation.component:Test-Distance.​value[x]:valueCodeableConcept Base preferred Visual Acuity Test Distance 📦2025.0.0-alpha This IG
Observation.component:Optotype-used.​value[x] Base preferred Visual Acuity Optotypes 📦2025.0.0-alpha This IG
Observation.component:Myadrisis.​value[x] Base required Performed NotPerformed 📦2025.0.0-alpha This IG
Observation.component:Pinhole-Occluder-used.​value[x] Base required Used NotUsed 📦2025.0.0-alpha This IG
Observation.component:SpecialVATestingParameters.​value[x] Base preferred Visual Acuity Special Testing Parameters 📦2025.0.0-alpha This IG
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Observation C 0..* MII_EyeMatics_OphthalmicObservation Measurements and simple assertions
Constraints: obs-6, obs-7, iop-laterality
... id Σ 0..1 id Logical id of this artifact
... meta Σ 0..1 Meta Metadata about the resource
... implicitRules ?!Σ 0..1 uri A set of rules under which this content was created
... language 0..1 code Language of the resource content
Binding: CommonLanguages (preferred): A human language.
Additional BindingsPurpose
AllLanguages Max Binding
... text 0..1 Narrative Text summary of the resource, for human interpretation
This profile does not constrain the narrative in regard to content, language, or traceability to data elements
... contained 0..* Resource Contained, inline Resources
... extension 0..* Extension Additional content defined by implementations
... modifierExtension ?! 0..* Extension Extensions that cannot be ignored
... identifier Σ 0..* Identifier Business Identifier for observation
... basedOn Σ 0..* Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest) Fulfills plan, proposal or order
... partOf Σ 0..* Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) Part of referenced event
... status ?!Σ 1..1 code registered | preliminary | final | amended +
Binding: ObservationStatus (required): Codes providing the status of an observation.
... Slices for category S 1..* CodeableConcept Classification of type of observation
Slice: Unordered, Open by pattern:$this
Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
.... category:exam S 1..1 CodeableConcept Classification of type of observation
Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.

Required Pattern: At least the following
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... coding 1..* Coding Code defined by a terminology system
Fixed Value: (Complex)
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
...... system 1..1 uri Identity of the terminology system
Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
...... version 0..1 string Version of the system - if relevant
...... code 1..1 code Symbol in syntax defined by the system
Fixed Value: exam
...... display 0..1 string Representation defined by the system
...... userSelected 0..1 boolean If this coding was chosen directly by the user
..... text 0..1 string Plain text representation of the concept
... code Σ 1..1 CodeableConcept Type of observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
.... id 0..0 string Unique id for inter-element referencing
.... extension 0..0 Extension Additional content defined by implementations
.... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
..... id 0..0 string Unique id for inter-element referencing
..... extension 0..0 Extension Additional content defined by implementations
..... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
..... version 0..0 string Version of the system - if relevant
..... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 260246004
..... display 1..1 string Representation defined by the system
Fixed Value: Visual Acuity finding
..... userSelected 0..0 boolean If this coding was chosen directly by the user
.... text 0..0 string Plain text representation of the concept
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... coding Σ 0..* Coding Additional codings
Binding: Visual Acuity Code (preferred)
.... text Σ 0..1 string Plain text representation of the concept
... subject SΣ 1..1 Reference(Patient) Who and/or what the observation is about
... focus Σ 0..* Reference(Resource) What the observation is about, when it is not about the subject of record
... encounter Σ 0..1 Reference(Encounter) Healthcare event during which this observation is made
... effective[x] Σ 0..1 Clinically relevant time/time-period for observation
.... effectiveDateTime dateTime
.... effectivePeriod Period
.... effectiveTiming Timing
.... effectiveInstant instant
... issued Σ 0..1 instant Date/Time this version was made available
... performer Σ 0..* Reference(Practitioner | PractitionerRole | Organization | CareTeam | Patient | RelatedPerson) Who is responsible for the observation
... Slices for value[x] SΣC 0..1 Actual result
Slice: Unordered, Closed by type:$this
.... valueQuantity Quantity
.... valueCodeableConcept CodeableConcept
.... valueString string
.... valueRatio Ratio
.... value[x]:valueRatio ΣC 0..1 Ratio Visual acuity expressed as a Snellen fraction
.... value[x]:valueQuantity ΣC 0..1 Quantity Visual acuity expressed as a simple quantity
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
..... value Σ 0..1 decimal Numerical value (with implicit precision)
..... comparator ?!Σ 0..1 code < | <= | >= | > - how to understand the value
Binding: QuantityComparator (required): How the Quantity should be understood and represented.
..... unit Σ 0..1 string Unit representation
..... system ΣC 0..1 uri System that defines coded unit form
..... code Σ 0..1 code Coded form of the unit
Binding: Visual Acuity Units (preferred)
.... value[x]:valueCodeableConcept ΣC 0..1 CodeableConcept Visual acuity expressed as a code
Binding: Visual Acuity Categorial Values (preferred)
.... value[x]:valueString ΣC 0..1 string Visual acuity expressed as a string (discouraged!)
... dataAbsentReason C 0..1 CodeableConcept Why the result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
... note S 0..* Annotation Free text note or Comments about the VA observation
... bodySite S 1..1 CodeableConcept Observed body part
Binding: Eye Laterality (required)
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... Slices for coding Σ 1..* Coding Code defined by a terminology system
Slice: Unordered, Open by pattern:$this
..... coding:laterality SΣ 1..1 Coding Code defined by a terminology system
Binding: Eye Laterality (required)
.... text Σ 0..1 string Plain text representation of the concept
... method 0..1 CodeableConcept VA measurement Method
Binding: VA Methods (preferred)
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... coding Σ 0..1 Coding Code defined by a terminology system
.... text Σ 0..1 string Plain text representation of the concept
... specimen 0..1 Reference(Specimen) Specimen used for this observation
... device 0..1 Reference(Device | DeviceMetric) (Measurement) Device
... referenceRange C 0..1 BackboneElement Provides guide for interpretation
Constraints: obs-3
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
.... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
.... low C 0..1 SimpleQuantity(4.0.1) Low Range, if relevant
.... high C 0..1 SimpleQuantity(4.0.1) High Range, if relevant
.... type 0..1 CodeableConcept Reference range qualifier
Binding: ObservationReferenceRangeMeaningCodes (preferred): Code for the meaning of a reference range.
.... appliesTo 0..* CodeableConcept Reference range population
Binding: ObservationReferenceRangeAppliesToCodes (example): Codes identifying the population the reference range applies to.
.... age 0..1 Range Applicable age range, if relevant
.... text 0..1 string Text based reference range in an observation
... hasMember Σ 0..* Reference(Observation | QuestionnaireResponse | MolecularSequence) Related resource that belongs to the Observation group
... derivedFrom Σ 0..* Reference(DocumentReference | ImagingStudy | Media | QuestionnaireResponse | Observation | MolecularSequence) Related measurements the observation is made from
... Slices for component Σ 0..* BackboneElement Component results
Slice: Unordered, Open by value:code, value:value
.... component:All Slices Content/Rules for all slices
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
..... value[x] Σ 0..1 Actual component result
...... valueQuantity Quantity
...... valueCodeableConcept CodeableConcept
...... valueString string
...... valueBoolean boolean
...... valueInteger integer
...... valueRange Range
...... valueRatio Ratio
...... valueSampledData SampledData
...... valueTime time
...... valueDateTime dateTime
...... valuePeriod Period
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:Correction-in-front-of-right-eye Σ 0..1 BackboneElement Component results
..... id 0..1 string Unique id for inter-element referencing
..... Slices for extension 0..* Extension Extension
Slice: Unordered, Open by value:url
...... extension:LensDuringVATestSpecification 0..1 (Complex) Extension
URL: https://eyematics.org/fhir/eyematics-kds/StructureDefinition/LensDuringVATestSpecification
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://loinc.org
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 29073-4
....... display 1..1 string Representation defined by the system
Fixed Value: Right eye Position
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Correction Methods (preferred)
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:Correction-in-front-of-left-eye Σ 0..1 BackboneElement Component results
..... id 0..1 string Unique id for inter-element referencing
..... Slices for extension 0..* Extension Extension
Slice: Unordered, Open by value:url
...... extension:LensDuringVATestSpecification 0..1 (Complex) Extension
URL: https://eyematics.org/fhir/eyematics-kds/StructureDefinition/LensDuringVATestSpecification
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://loinc.org
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 29074-2
....... display 1..1 string Representation defined by the system
Fixed Value: Left eye Position
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Correction Methods (preferred)
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:Test-Distance Σ 0..1 BackboneElement Distance of Visual acuity Test
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 252124009
....... display 1..1 string Representation defined by the system
Fixed Value: Test distance
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... Slices for value[x] Σ 0..1 Actual component result
Slice: Unordered, Open by type:$this
...... valueQuantity Quantity
...... valueCodeableConcept CodeableConcept
...... value[x]:valueCodeableConcept Σ 0..1 CodeableConcept Measurement Distance as Coded Concept
Binding: Visual Acuity Test Distance (preferred)
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:Optotype-used Σ 0..1 BackboneElement Optotype used
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 0..0 uri Identity of the terminology system
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: Optotype
....... display 1..1 string Representation defined by the system
Fixed Value: Optotype
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Optotypes (preferred)
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:Myadrisis Σ 0..1 BackboneElement Component results
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 37125009
....... display 1..1 string Representation defined by the system
Fixed Value: Dilated pupil (finding)
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Performed NotPerformed (required)
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:Pinhole-Occluder-used Σ 0..1 BackboneElement Component results
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 257492003
....... display 1..1 string Representation defined by the system
Fixed Value: Pinhole (physical object)
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Used NotUsed (required)
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:SpecialVATestingParameters Σ 0..* BackboneElement Component results
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 370115009
....... display 1..1 string Representation defined by the system
Fixed Value: Special Concept
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Special Testing Parameters (preferred)
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result

doco Documentation for this format

Terminology Bindings

Path Status Usage ValueSet Version Source
Observation.language Base preferred Common Languages 📍4.0.1 FHIR Std.
Observation.status Base required ObservationStatus 📍4.0.1 FHIR Std.
Observation.category Base preferred Observation Category Codes 📍4.0.1 FHIR Std.
Observation.category:exam Base preferred Observation Category Codes 📍4.0.1 FHIR Std.
Observation.code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.code.coding Base preferred Visual Acuity Code 📦2025.0.0-alpha This IG
Observation.value[x]:valueQuantity.​comparator Base required QuantityComparator 📍4.0.1 FHIR Std.
Observation.value[x]:valueQuantity.​code Base preferred Visual Acuity Units 📦2025.0.0-alpha This IG
Observation.value[x]:valueCodeableConcept Base preferred Visual Acuity Categorial Values 📦2025.0.0-alpha This IG
Observation.dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.bodySite Base required Eye Laterality 📦2025.0.0-alpha This IG
Observation.bodySite.​coding:laterality Base required Eye Laterality 📦2025.0.0-alpha This IG
Observation.method Base preferred VA Methods 📦2025.0.0-alpha This IG
Observation.referenceRange.​type Base preferred Observation Reference Range Meaning Codes 📍4.0.1 FHIR Std.
Observation.referenceRange.​appliesTo Base example Observation Reference Range Applies To Codes 📍4.0.1 FHIR Std.
Observation.component.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-right-eye.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-right-eye.​value[x] Base preferred Visual Acuity Correction Methods 📦2025.0.0-alpha This IG
Observation.component:Correction-in-front-of-right-eye.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-right-eye.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-left-eye.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-left-eye.​value[x] Base preferred Visual Acuity Correction Methods 📦2025.0.0-alpha This IG
Observation.component:Correction-in-front-of-left-eye.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-left-eye.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.component:Test-Distance.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Test-Distance.​value[x]:valueCodeableConcept Base preferred Visual Acuity Test Distance 📦2025.0.0-alpha This IG
Observation.component:Test-Distance.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component:Test-Distance.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.component:Optotype-used.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Optotype-used.​value[x] Base preferred Visual Acuity Optotypes 📦2025.0.0-alpha This IG
Observation.component:Optotype-used.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component:Optotype-used.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.component:Myadrisis.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Myadrisis.​value[x] Base required Performed NotPerformed 📦2025.0.0-alpha This IG
Observation.component:Myadrisis.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component:Myadrisis.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.component:Pinhole-Occluder-used.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Pinhole-Occluder-used.​value[x] Base required Used NotUsed 📦2025.0.0-alpha This IG
Observation.component:Pinhole-Occluder-used.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component:Pinhole-Occluder-used.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.component:SpecialVATestingParameters.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:SpecialVATestingParameters.​value[x] Base preferred Visual Acuity Special Testing Parameters 📦2025.0.0-alpha This IG
Observation.component:SpecialVATestingParameters.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component:SpecialVATestingParameters.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.

Constraints

Id Grade Path(s) Description Expression
dom-2 error Observation If the resource is contained in another resource, it SHALL NOT contain nested Resources contained.contained.empty()
dom-3 error Observation If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4 error Observation If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5 error Observation If a resource is contained in another resource, it SHALL NOT have a security label contained.meta.security.empty()
dom-6 best practice Observation A resource should have narrative for robust management text.`div`.exists()
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()
iop-laterality error Observation Seitigkeit vom LOINC-Code und Seitigkeit von Observation.bodySite müssen übereinstimmen. (Observation.code.coding.where(code='79893-4').exists() implies bodySite.coding.code = '1290041000') and (Observation.code.coding.where(code='79892-6').exists() implies bodySite.coding.code = '79892-6')
obs-3 error Observation.referenceRange Must have at least a low or a high or text low.exists() or high.exists() or text.exists()
obs-6 error Observation dataAbsentReason SHALL only be present if Observation.value[x] is not present dataAbsentReason.empty() or value.empty()
obs-7 error Observation If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

This structure is derived from MII_EyeMatics_OphthalmicObservation

Summary

Mandatory: 1 element
Must-Support: 2 elements
Fixed: 8 elements

Extensions

This structure refers to these extensions:

Slices

This structure defines the following Slices:

  • The element 1 is sliced based on the value of Observation.value[x]
  • The element 2 is sliced based on the values of Observation.component
  • The element 1 is sliced based on the value of Observation.component.value[x]

Key Elements View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Observation C 0..* MII_EyeMatics_OphthalmicObservation Measurements and simple assertions
Constraints: obs-6, obs-7, iop-laterality
... implicitRules ?!Σ 0..1 uri A set of rules under which this content was created
... modifierExtension ?! 0..* Extension Extensions that cannot be ignored
... status ?!Σ 1..1 code registered | preliminary | final | amended +
Binding: ObservationStatus (required): Codes providing the status of an observation.
.... category:exam S 1..1 CodeableConcept Classification of type of observation
Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.

Required Pattern: At least the following
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... coding 1..* Coding Code defined by a terminology system
Fixed Value: (Complex)
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
...... system 1..1 uri Identity of the terminology system
Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
...... version 0..1 string Version of the system - if relevant
...... code 1..1 code Symbol in syntax defined by the system
Fixed Value: exam
...... display 0..1 string Representation defined by the system
...... userSelected 0..1 boolean If this coding was chosen directly by the user
..... text 0..1 string Plain text representation of the concept
... code Σ 1..1 CodeableConcept Type of observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
.... id 0..0 string Unique id for inter-element referencing
.... extension 0..0 Extension Additional content defined by implementations
.... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
..... id 0..0 string Unique id for inter-element referencing
..... extension 0..0 Extension Additional content defined by implementations
..... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
..... version 0..0 string Version of the system - if relevant
..... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 260246004
..... display 1..1 string Representation defined by the system
Fixed Value: Visual Acuity finding
..... userSelected 0..0 boolean If this coding was chosen directly by the user
.... text 0..0 string Plain text representation of the concept
.... coding Σ 0..* Coding Additional codings
Binding: Visual Acuity Code (preferred)
... subject SΣ 1..1 Reference(Patient) Who and/or what the observation is about
... Slices for value[x] SΣC 0..1 Actual result
Slice: Unordered, Closed by type:$this
.... valueQuantity Quantity
.... valueCodeableConcept CodeableConcept
.... valueString string
.... valueRatio Ratio
.... value[x]:valueRatio ΣC 0..1 Ratio Visual acuity expressed as a Snellen fraction
.... value[x]:valueQuantity ΣC 0..1 Quantity Visual acuity expressed as a simple quantity
..... comparator ?!Σ 0..1 code < | <= | >= | > - how to understand the value
Binding: QuantityComparator (required): How the Quantity should be understood and represented.
..... code Σ 0..1 code Coded form of the unit
Binding: Visual Acuity Units (preferred)
.... value[x]:valueCodeableConcept ΣC 0..1 CodeableConcept Visual acuity expressed as a code
Binding: Visual Acuity Categorial Values (preferred)
.... value[x]:valueString ΣC 0..1 string Visual acuity expressed as a string (discouraged!)
... note S 0..* Annotation Free text note or Comments about the VA observation
... bodySite S 1..1 CodeableConcept Observed body part
Binding: Eye Laterality (required)
.... Slices for coding Σ 1..* Coding Code defined by a terminology system
Slice: Unordered, Open by pattern:$this
..... coding:laterality SΣ 1..1 Coding Code defined by a terminology system
Binding: Eye Laterality (required)
... method 0..1 CodeableConcept VA measurement Method
Binding: VA Methods (preferred)
.... coding Σ 0..1 Coding Code defined by a terminology system
... referenceRange C 0..1 BackboneElement Provides guide for interpretation
Constraints: obs-3
.... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
... Slices for component Σ 0..* BackboneElement Component results
Slice: Unordered, Open by value:code, value:value
.... component:All Slices Content/Rules for all slices
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
.... component:Correction-in-front-of-right-eye Σ 0..1 BackboneElement Component results
..... Slices for extension 0..* Extension Extension
Slice: Unordered, Open by value:url
...... extension:LensDuringVATestSpecification 0..1 (Complex) Extension
URL: https://eyematics.org/fhir/eyematics-kds/StructureDefinition/LensDuringVATestSpecification
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://loinc.org
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 29073-4
....... display 1..1 string Representation defined by the system
Fixed Value: Right eye Position
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Correction Methods (preferred)
.... component:Correction-in-front-of-left-eye Σ 0..1 BackboneElement Component results
..... Slices for extension 0..* Extension Extension
Slice: Unordered, Open by value:url
...... extension:LensDuringVATestSpecification 0..1 (Complex) Extension
URL: https://eyematics.org/fhir/eyematics-kds/StructureDefinition/LensDuringVATestSpecification
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://loinc.org
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 29074-2
....... display 1..1 string Representation defined by the system
Fixed Value: Left eye Position
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Correction Methods (preferred)
.... component:Test-Distance Σ 0..1 BackboneElement Distance of Visual acuity Test
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 252124009
....... display 1..1 string Representation defined by the system
Fixed Value: Test distance
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... Slices for value[x] Σ 0..1 Actual component result
Slice: Unordered, Open by type:$this
...... valueQuantity Quantity
...... valueCodeableConcept CodeableConcept
...... value[x]:valueCodeableConcept Σ 0..1 CodeableConcept Measurement Distance as Coded Concept
Binding: Visual Acuity Test Distance (preferred)
.... component:Optotype-used Σ 0..1 BackboneElement Optotype used
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 0..0 uri Identity of the terminology system
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: Optotype
....... display 1..1 string Representation defined by the system
Fixed Value: Optotype
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Optotypes (preferred)
.... component:Myadrisis Σ 0..1 BackboneElement Component results
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 37125009
....... display 1..1 string Representation defined by the system
Fixed Value: Dilated pupil (finding)
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Performed NotPerformed (required)
.... component:Pinhole-Occluder-used Σ 0..1 BackboneElement Component results
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 257492003
....... display 1..1 string Representation defined by the system
Fixed Value: Pinhole (physical object)
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Used NotUsed (required)
.... component:SpecialVATestingParameters Σ 0..* BackboneElement Component results
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 370115009
....... display 1..1 string Representation defined by the system
Fixed Value: Special Concept
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Special Testing Parameters (preferred)

doco Documentation for this format

Terminology Bindings

Path Status Usage ValueSet Version Source
Observation.status Base required ObservationStatus 📍4.0.1 FHIR Std.
Observation.category Base preferred Observation Category Codes 📍4.0.1 FHIR Std.
Observation.category:exam Base preferred Observation Category Codes 📍4.0.1 FHIR Std.
Observation.code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.code.coding Base preferred Visual Acuity Code 📦2025.0.0-alpha This IG
Observation.value[x]:valueQuantity.​comparator Base required QuantityComparator 📍4.0.1 FHIR Std.
Observation.value[x]:valueQuantity.​code Base preferred Visual Acuity Units 📦2025.0.0-alpha This IG
Observation.value[x]:valueCodeableConcept Base preferred Visual Acuity Categorial Values 📦2025.0.0-alpha This IG
Observation.bodySite Base required Eye Laterality 📦2025.0.0-alpha This IG
Observation.bodySite.​coding:laterality Base required Eye Laterality 📦2025.0.0-alpha This IG
Observation.method Base preferred VA Methods 📦2025.0.0-alpha This IG
Observation.component.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-right-eye.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-right-eye.​value[x] Base preferred Visual Acuity Correction Methods 📦2025.0.0-alpha This IG
Observation.component:Correction-in-front-of-left-eye.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-left-eye.​value[x] Base preferred Visual Acuity Correction Methods 📦2025.0.0-alpha This IG
Observation.component:Test-Distance.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Test-Distance.​value[x]:valueCodeableConcept Base preferred Visual Acuity Test Distance 📦2025.0.0-alpha This IG
Observation.component:Optotype-used.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Optotype-used.​value[x] Base preferred Visual Acuity Optotypes 📦2025.0.0-alpha This IG
Observation.component:Myadrisis.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Myadrisis.​value[x] Base required Performed NotPerformed 📦2025.0.0-alpha This IG
Observation.component:Pinhole-Occluder-used.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Pinhole-Occluder-used.​value[x] Base required Used NotUsed 📦2025.0.0-alpha This IG
Observation.component:SpecialVATestingParameters.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:SpecialVATestingParameters.​value[x] Base preferred Visual Acuity Special Testing Parameters 📦2025.0.0-alpha This IG

Constraints

Id Grade Path(s) Description Expression
dom-2 error Observation If the resource is contained in another resource, it SHALL NOT contain nested Resources contained.contained.empty()
dom-3 error Observation If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4 error Observation If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5 error Observation If a resource is contained in another resource, it SHALL NOT have a security label contained.meta.security.empty()
dom-6 best practice Observation A resource should have narrative for robust management text.`div`.exists()
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()
iop-laterality error Observation Seitigkeit vom LOINC-Code und Seitigkeit von Observation.bodySite müssen übereinstimmen. (Observation.code.coding.where(code='79893-4').exists() implies bodySite.coding.code = '1290041000') and (Observation.code.coding.where(code='79892-6').exists() implies bodySite.coding.code = '79892-6')
obs-3 error Observation.referenceRange Must have at least a low or a high or text low.exists() or high.exists() or text.exists()
obs-6 error Observation dataAbsentReason SHALL only be present if Observation.value[x] is not present dataAbsentReason.empty() or value.empty()
obs-7 error Observation If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

Differential View

This structure is derived from MII_EyeMatics_OphthalmicObservation

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Observation 0..* MII_EyeMatics_OphthalmicObservation Measurements and simple assertions
... code 1..1 CodeableConcept Type of observation (code / type)
Fixed Value: As shown
.... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
..... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
..... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 260246004
..... display 1..1 string Representation defined by the system
Fixed Value: Visual Acuity finding
.... coding 0..* Coding Additional codings
Binding: Visual Acuity Code (preferred)
... Slices for value[x] S 0..1 Actual result
Slice: Unordered, Open by type:$this
.... valueQuantity Quantity
.... valueCodeableConcept CodeableConcept
.... valueString string
.... valueRatio Ratio
.... value[x]:valueRatio 0..1 Ratio Visual acuity expressed as a Snellen fraction
.... value[x]:valueQuantity 0..1 Quantity Visual acuity expressed as a simple quantity
..... code 0..1 code Coded form of the unit
Binding: Visual Acuity Units (preferred)
.... value[x]:valueCodeableConcept 0..1 CodeableConcept Visual acuity expressed as a code
Binding: Visual Acuity Categorial Values (preferred)
.... value[x]:valueString 0..1 string Visual acuity expressed as a string (discouraged!)
... note S 0..* Annotation Free text note or Comments about the VA observation
... method 0..1 CodeableConcept VA measurement Method
Binding: VA Methods (preferred)
.... coding 0..1 Coding Code defined by a terminology system
... referenceRange 0..1 BackboneElement Provides guide for interpretation
... Slices for component 0..* BackboneElement Component results
Slice: Unordered, Open by value:code, value:value
.... component:Correction-in-front-of-right-eye 0..1 BackboneElement Component results
..... Slices for extension 0..* Extension Extension
Slice: Unordered, Open by value:url
...... extension:LensDuringVATestSpecification 0..1 (Complex) Extension
URL: https://eyematics.org/fhir/eyematics-kds/StructureDefinition/LensDuringVATestSpecification
..... code 1..1 CodeableConcept Type of component observation (code / type)
Fixed Value: As shown
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://loinc.org
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 29073-4
....... display 1..1 string Representation defined by the system
Fixed Value: Right eye Position
..... value[x] 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Correction Methods (preferred)
.... component:Correction-in-front-of-left-eye 0..1 BackboneElement Component results
..... Slices for extension 0..* Extension Extension
Slice: Unordered, Open by value:url
...... extension:LensDuringVATestSpecification 0..1 (Complex) Extension
URL: https://eyematics.org/fhir/eyematics-kds/StructureDefinition/LensDuringVATestSpecification
..... code 1..1 CodeableConcept Type of component observation (code / type)
Fixed Value: As shown
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://loinc.org
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 29074-2
....... display 1..1 string Representation defined by the system
Fixed Value: Left eye Position
..... value[x] 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Correction Methods (preferred)
.... component:Test-Distance 0..1 BackboneElement Distance of Visual acuity Test
..... code 1..1 CodeableConcept Type of component observation (code / type)
Fixed Value: As shown
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 252124009
....... display 1..1 string Representation defined by the system
Fixed Value: Test distance
..... Slices for value[x] 0..1 Actual component result
Slice: Unordered, Open by type:$this
...... valueQuantity Quantity
...... valueCodeableConcept CodeableConcept
...... value[x]:valueCodeableConcept 0..1 CodeableConcept Measurement Distance as Coded Concept
Binding: Visual Acuity Test Distance (preferred)
.... component:Optotype-used 0..1 BackboneElement Optotype used
..... code 1..1 CodeableConcept Type of component observation (code / type)
Fixed Value: As shown
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: Optotype
....... display 1..1 string Representation defined by the system
Fixed Value: Optotype
..... value[x] 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Optotypes (preferred)
.... component:Myadrisis 0..1 BackboneElement Component results
..... code 1..1 CodeableConcept Type of component observation (code / type)
Fixed Value: As shown
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 37125009
....... display 1..1 string Representation defined by the system
Fixed Value: Dilated pupil (finding)
..... value[x] 0..1 CodeableConcept Actual component result
Binding: Performed NotPerformed (required)
.... component:Pinhole-Occluder-used 0..1 BackboneElement Component results
..... code 1..1 CodeableConcept Type of component observation (code / type)
Fixed Value: As shown
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 257492003
....... display 1..1 string Representation defined by the system
Fixed Value: Pinhole (physical object)
..... value[x] 0..1 CodeableConcept Actual component result
Binding: Used NotUsed (required)
.... component:SpecialVATestingParameters 0..* BackboneElement Component results
..... code 1..1 CodeableConcept Type of component observation (code / type)
Fixed Value: As shown
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 370115009
....... display 1..1 string Representation defined by the system
Fixed Value: Special Concept
..... value[x] 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Special Testing Parameters (preferred)

doco Documentation for this format

Terminology Bindings (Differential)

Path Status Usage ValueSet Version Source
Observation.code.coding Base preferred Visual Acuity Code 📦2025.0.0-alpha This IG
Observation.value[x]:valueQuantity.​code Base preferred Visual Acuity Units 📦2025.0.0-alpha This IG
Observation.value[x]:valueCodeableConcept Base preferred Visual Acuity Categorial Values 📦2025.0.0-alpha This IG
Observation.bodySite Base required Eye Laterality 📦2025.0.0-alpha This IG
Observation.method Base preferred VA Methods 📦2025.0.0-alpha This IG
Observation.component:Correction-in-front-of-right-eye.​value[x] Base preferred Visual Acuity Correction Methods 📦2025.0.0-alpha This IG
Observation.component:Correction-in-front-of-left-eye.​value[x] Base preferred Visual Acuity Correction Methods 📦2025.0.0-alpha This IG
Observation.component:Test-Distance.​value[x]:valueCodeableConcept Base preferred Visual Acuity Test Distance 📦2025.0.0-alpha This IG
Observation.component:Optotype-used.​value[x] Base preferred Visual Acuity Optotypes 📦2025.0.0-alpha This IG
Observation.component:Myadrisis.​value[x] Base required Performed NotPerformed 📦2025.0.0-alpha This IG
Observation.component:Pinhole-Occluder-used.​value[x] Base required Used NotUsed 📦2025.0.0-alpha This IG
Observation.component:SpecialVATestingParameters.​value[x] Base preferred Visual Acuity Special Testing Parameters 📦2025.0.0-alpha This IG

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Observation C 0..* MII_EyeMatics_OphthalmicObservation Measurements and simple assertions
Constraints: obs-6, obs-7, iop-laterality
... id Σ 0..1 id Logical id of this artifact
... meta Σ 0..1 Meta Metadata about the resource
... implicitRules ?!Σ 0..1 uri A set of rules under which this content was created
... language 0..1 code Language of the resource content
Binding: CommonLanguages (preferred): A human language.
Additional BindingsPurpose
AllLanguages Max Binding
... text 0..1 Narrative Text summary of the resource, for human interpretation
This profile does not constrain the narrative in regard to content, language, or traceability to data elements
... contained 0..* Resource Contained, inline Resources
... extension 0..* Extension Additional content defined by implementations
... modifierExtension ?! 0..* Extension Extensions that cannot be ignored
... identifier Σ 0..* Identifier Business Identifier for observation
... basedOn Σ 0..* Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest) Fulfills plan, proposal or order
... partOf Σ 0..* Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) Part of referenced event
... status ?!Σ 1..1 code registered | preliminary | final | amended +
Binding: ObservationStatus (required): Codes providing the status of an observation.
... Slices for category S 1..* CodeableConcept Classification of type of observation
Slice: Unordered, Open by pattern:$this
Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
.... category:exam S 1..1 CodeableConcept Classification of type of observation
Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.

Required Pattern: At least the following
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... coding 1..* Coding Code defined by a terminology system
Fixed Value: (Complex)
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
...... system 1..1 uri Identity of the terminology system
Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
...... version 0..1 string Version of the system - if relevant
...... code 1..1 code Symbol in syntax defined by the system
Fixed Value: exam
...... display 0..1 string Representation defined by the system
...... userSelected 0..1 boolean If this coding was chosen directly by the user
..... text 0..1 string Plain text representation of the concept
... code Σ 1..1 CodeableConcept Type of observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
.... id 0..0 string Unique id for inter-element referencing
.... extension 0..0 Extension Additional content defined by implementations
.... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
..... id 0..0 string Unique id for inter-element referencing
..... extension 0..0 Extension Additional content defined by implementations
..... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
..... version 0..0 string Version of the system - if relevant
..... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 260246004
..... display 1..1 string Representation defined by the system
Fixed Value: Visual Acuity finding
..... userSelected 0..0 boolean If this coding was chosen directly by the user
.... text 0..0 string Plain text representation of the concept
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... coding Σ 0..* Coding Additional codings
Binding: Visual Acuity Code (preferred)
.... text Σ 0..1 string Plain text representation of the concept
... subject SΣ 1..1 Reference(Patient) Who and/or what the observation is about
... focus Σ 0..* Reference(Resource) What the observation is about, when it is not about the subject of record
... encounter Σ 0..1 Reference(Encounter) Healthcare event during which this observation is made
... effective[x] Σ 0..1 Clinically relevant time/time-period for observation
.... effectiveDateTime dateTime
.... effectivePeriod Period
.... effectiveTiming Timing
.... effectiveInstant instant
... issued Σ 0..1 instant Date/Time this version was made available
... performer Σ 0..* Reference(Practitioner | PractitionerRole | Organization | CareTeam | Patient | RelatedPerson) Who is responsible for the observation
... Slices for value[x] SΣC 0..1 Actual result
Slice: Unordered, Closed by type:$this
.... valueQuantity Quantity
.... valueCodeableConcept CodeableConcept
.... valueString string
.... valueRatio Ratio
.... value[x]:valueRatio ΣC 0..1 Ratio Visual acuity expressed as a Snellen fraction
.... value[x]:valueQuantity ΣC 0..1 Quantity Visual acuity expressed as a simple quantity
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
..... value Σ 0..1 decimal Numerical value (with implicit precision)
..... comparator ?!Σ 0..1 code < | <= | >= | > - how to understand the value
Binding: QuantityComparator (required): How the Quantity should be understood and represented.
..... unit Σ 0..1 string Unit representation
..... system ΣC 0..1 uri System that defines coded unit form
..... code Σ 0..1 code Coded form of the unit
Binding: Visual Acuity Units (preferred)
.... value[x]:valueCodeableConcept ΣC 0..1 CodeableConcept Visual acuity expressed as a code
Binding: Visual Acuity Categorial Values (preferred)
.... value[x]:valueString ΣC 0..1 string Visual acuity expressed as a string (discouraged!)
... dataAbsentReason C 0..1 CodeableConcept Why the result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
... note S 0..* Annotation Free text note or Comments about the VA observation
... bodySite S 1..1 CodeableConcept Observed body part
Binding: Eye Laterality (required)
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... Slices for coding Σ 1..* Coding Code defined by a terminology system
Slice: Unordered, Open by pattern:$this
..... coding:laterality SΣ 1..1 Coding Code defined by a terminology system
Binding: Eye Laterality (required)
.... text Σ 0..1 string Plain text representation of the concept
... method 0..1 CodeableConcept VA measurement Method
Binding: VA Methods (preferred)
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... coding Σ 0..1 Coding Code defined by a terminology system
.... text Σ 0..1 string Plain text representation of the concept
... specimen 0..1 Reference(Specimen) Specimen used for this observation
... device 0..1 Reference(Device | DeviceMetric) (Measurement) Device
... referenceRange C 0..1 BackboneElement Provides guide for interpretation
Constraints: obs-3
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
.... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
.... low C 0..1 SimpleQuantity(4.0.1) Low Range, if relevant
.... high C 0..1 SimpleQuantity(4.0.1) High Range, if relevant
.... type 0..1 CodeableConcept Reference range qualifier
Binding: ObservationReferenceRangeMeaningCodes (preferred): Code for the meaning of a reference range.
.... appliesTo 0..* CodeableConcept Reference range population
Binding: ObservationReferenceRangeAppliesToCodes (example): Codes identifying the population the reference range applies to.
.... age 0..1 Range Applicable age range, if relevant
.... text 0..1 string Text based reference range in an observation
... hasMember Σ 0..* Reference(Observation | QuestionnaireResponse | MolecularSequence) Related resource that belongs to the Observation group
... derivedFrom Σ 0..* Reference(DocumentReference | ImagingStudy | Media | QuestionnaireResponse | Observation | MolecularSequence) Related measurements the observation is made from
... Slices for component Σ 0..* BackboneElement Component results
Slice: Unordered, Open by value:code, value:value
.... component:All Slices Content/Rules for all slices
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
..... value[x] Σ 0..1 Actual component result
...... valueQuantity Quantity
...... valueCodeableConcept CodeableConcept
...... valueString string
...... valueBoolean boolean
...... valueInteger integer
...... valueRange Range
...... valueRatio Ratio
...... valueSampledData SampledData
...... valueTime time
...... valueDateTime dateTime
...... valuePeriod Period
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:Correction-in-front-of-right-eye Σ 0..1 BackboneElement Component results
..... id 0..1 string Unique id for inter-element referencing
..... Slices for extension 0..* Extension Extension
Slice: Unordered, Open by value:url
...... extension:LensDuringVATestSpecification 0..1 (Complex) Extension
URL: https://eyematics.org/fhir/eyematics-kds/StructureDefinition/LensDuringVATestSpecification
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://loinc.org
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 29073-4
....... display 1..1 string Representation defined by the system
Fixed Value: Right eye Position
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Correction Methods (preferred)
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:Correction-in-front-of-left-eye Σ 0..1 BackboneElement Component results
..... id 0..1 string Unique id for inter-element referencing
..... Slices for extension 0..* Extension Extension
Slice: Unordered, Open by value:url
...... extension:LensDuringVATestSpecification 0..1 (Complex) Extension
URL: https://eyematics.org/fhir/eyematics-kds/StructureDefinition/LensDuringVATestSpecification
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://loinc.org
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 29074-2
....... display 1..1 string Representation defined by the system
Fixed Value: Left eye Position
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Correction Methods (preferred)
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:Test-Distance Σ 0..1 BackboneElement Distance of Visual acuity Test
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 252124009
....... display 1..1 string Representation defined by the system
Fixed Value: Test distance
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... Slices for value[x] Σ 0..1 Actual component result
Slice: Unordered, Open by type:$this
...... valueQuantity Quantity
...... valueCodeableConcept CodeableConcept
...... value[x]:valueCodeableConcept Σ 0..1 CodeableConcept Measurement Distance as Coded Concept
Binding: Visual Acuity Test Distance (preferred)
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:Optotype-used Σ 0..1 BackboneElement Optotype used
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 0..0 uri Identity of the terminology system
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: Optotype
....... display 1..1 string Representation defined by the system
Fixed Value: Optotype
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Optotypes (preferred)
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:Myadrisis Σ 0..1 BackboneElement Component results
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 37125009
....... display 1..1 string Representation defined by the system
Fixed Value: Dilated pupil (finding)
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Performed NotPerformed (required)
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:Pinhole-Occluder-used Σ 0..1 BackboneElement Component results
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 257492003
....... display 1..1 string Representation defined by the system
Fixed Value: Pinhole (physical object)
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Used NotUsed (required)
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:SpecialVATestingParameters Σ 0..* BackboneElement Component results
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Fixed Value: As shown
...... id 0..0 string Unique id for inter-element referencing
...... extension 0..0 Extension Additional content defined by implementations
...... coding 1..1 Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..0 string Unique id for inter-element referencing
....... extension 0..0 Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: http://snomed.info/sct
....... version 0..0 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 370115009
....... display 1..1 string Representation defined by the system
Fixed Value: Special Concept
....... userSelected 0..0 boolean If this coding was chosen directly by the user
...... text 0..0 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
Binding: Visual Acuity Special Testing Parameters (preferred)
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result

doco Documentation for this format

Terminology Bindings

Path Status Usage ValueSet Version Source
Observation.language Base preferred Common Languages 📍4.0.1 FHIR Std.
Observation.status Base required ObservationStatus 📍4.0.1 FHIR Std.
Observation.category Base preferred Observation Category Codes 📍4.0.1 FHIR Std.
Observation.category:exam Base preferred Observation Category Codes 📍4.0.1 FHIR Std.
Observation.code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.code.coding Base preferred Visual Acuity Code 📦2025.0.0-alpha This IG
Observation.value[x]:valueQuantity.​comparator Base required QuantityComparator 📍4.0.1 FHIR Std.
Observation.value[x]:valueQuantity.​code Base preferred Visual Acuity Units 📦2025.0.0-alpha This IG
Observation.value[x]:valueCodeableConcept Base preferred Visual Acuity Categorial Values 📦2025.0.0-alpha This IG
Observation.dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.bodySite Base required Eye Laterality 📦2025.0.0-alpha This IG
Observation.bodySite.​coding:laterality Base required Eye Laterality 📦2025.0.0-alpha This IG
Observation.method Base preferred VA Methods 📦2025.0.0-alpha This IG
Observation.referenceRange.​type Base preferred Observation Reference Range Meaning Codes 📍4.0.1 FHIR Std.
Observation.referenceRange.​appliesTo Base example Observation Reference Range Applies To Codes 📍4.0.1 FHIR Std.
Observation.component.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-right-eye.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-right-eye.​value[x] Base preferred Visual Acuity Correction Methods 📦2025.0.0-alpha This IG
Observation.component:Correction-in-front-of-right-eye.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-right-eye.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-left-eye.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-left-eye.​value[x] Base preferred Visual Acuity Correction Methods 📦2025.0.0-alpha This IG
Observation.component:Correction-in-front-of-left-eye.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component:Correction-in-front-of-left-eye.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.component:Test-Distance.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Test-Distance.​value[x]:valueCodeableConcept Base preferred Visual Acuity Test Distance 📦2025.0.0-alpha This IG
Observation.component:Test-Distance.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component:Test-Distance.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.component:Optotype-used.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Optotype-used.​value[x] Base preferred Visual Acuity Optotypes 📦2025.0.0-alpha This IG
Observation.component:Optotype-used.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component:Optotype-used.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.component:Myadrisis.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Myadrisis.​value[x] Base required Performed NotPerformed 📦2025.0.0-alpha This IG
Observation.component:Myadrisis.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component:Myadrisis.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.component:Pinhole-Occluder-used.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:Pinhole-Occluder-used.​value[x] Base required Used NotUsed 📦2025.0.0-alpha This IG
Observation.component:Pinhole-Occluder-used.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component:Pinhole-Occluder-used.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.
Observation.component:SpecialVATestingParameters.​code Base example LOINC Codes 📍4.0.1 FHIR Std.
Observation.component:SpecialVATestingParameters.​value[x] Base preferred Visual Acuity Special Testing Parameters 📦2025.0.0-alpha This IG
Observation.component:SpecialVATestingParameters.​dataAbsentReason Base extensible DataAbsentReason 📍4.0.1 FHIR Std.
Observation.component:SpecialVATestingParameters.​interpretation Base extensible Observation Interpretation Codes 📍4.0.1 FHIR Std.

Constraints

Id Grade Path(s) Description Expression
dom-2 error Observation If the resource is contained in another resource, it SHALL NOT contain nested Resources contained.contained.empty()
dom-3 error Observation If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4 error Observation If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5 error Observation If a resource is contained in another resource, it SHALL NOT have a security label contained.meta.security.empty()
dom-6 best practice Observation A resource should have narrative for robust management text.`div`.exists()
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()
iop-laterality error Observation Seitigkeit vom LOINC-Code und Seitigkeit von Observation.bodySite müssen übereinstimmen. (Observation.code.coding.where(code='79893-4').exists() implies bodySite.coding.code = '1290041000') and (Observation.code.coding.where(code='79892-6').exists() implies bodySite.coding.code = '79892-6')
obs-3 error Observation.referenceRange Must have at least a low or a high or text low.exists() or high.exists() or text.exists()
obs-6 error Observation dataAbsentReason SHALL only be present if Observation.value[x] is not present dataAbsentReason.empty() or value.empty()
obs-7 error Observation If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

This structure is derived from MII_EyeMatics_OphthalmicObservation

Summary

Mandatory: 1 element
Must-Support: 2 elements
Fixed: 8 elements

Extensions

This structure refers to these extensions:

Slices

This structure defines the following Slices:

  • The element 1 is sliced based on the value of Observation.value[x]
  • The element 2 is sliced based on the values of Observation.component
  • The element 1 is sliced based on the value of Observation.component.value[x]

 

Other representations of profile: CSV, Excel, Schematron