<status value="draft" /> <publisher value="Nictiz" /> <contact> <name value="Nictiz" /> <telecom> <system value="url" /> <value value="https://www.nictiz.nl" /> <use value="work" /> </telecom> </contact> <description value="Visual acuity is a measurement of sharpness of vision. It is a measure of the smallest details that someone can still distinguish." /> <purpose value="This Observation resource represents the Dutch [zib ('Zorginformatiebouwsteen', i.e. Health and Care Information Model) VisualAcuity v1.0 (2020)](https://zibs.nl/wiki/VisualAcuity-v1.0(2020EN))." /> <copyright value="Copyright and related rights waived via CC0, https://creativecommons.org/publicdomain/zero/1.0/. This does not apply to information from third parties, for example a medical terminology system. The implementer alone is responsible for identifying and obtaining any necessary licenses or authorizations to utilize third party IP in connection with the specification or otherwise." /> <fhirVersion value="4.0.1" /> <mapping> <identity value="zib-visualacuity-v1.0-2020EN" /> <uri value="https://zibs.nl/wiki/VisualAcuity-v1.0(2020EN)" /> <name value="zib VisualAcuity-v1.0(2020EN)" /> </mapping> <kind value="resource" /> <abstract value="true" /> <type value="Observation" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Observation" /> <derivation value="constraint" /> <differential> <element id="Observation"> <path value="Observation" /> <short value="VisualAcuity" /> <alias value="Visus" /> <mapping> <identity value="zib-visualacuity-v1.0-2020EN" /> <map value="NL-CM:12.19.1" /> <comment value="VisualAcuity" /> </mapping> </element> <element id="Observation.code"> <path value="Observation.code" /> <patternCodeableConcept> <coding> <system value="http://snomed.info/sct" /> <code value="260246004" /> </coding> </patternCodeableConcept> </element> <element id="Observation.effective[x]"> <path value="Observation.effective[x]" /> <slicing> <discriminator> <type value="type" /> <path value="$this" /> </discriminator> <rules value="open" /> </slicing> </element> <element id="Observation.effective[x]:effectiveDateTime"> <path value="Observation.effective[x]" /> <sliceName value="effectiveDateTime" /> <short value="VisualAcuityDateTime" /> <definition value="The date and time when the visual acuity was measured." /> <alias value="VisusDatumTijd" /> <type> <code value="dateTime" /> </type> <mapping> <identity value="zib-visualacuity-v1.0-2020EN" /> <map value="NL-CM:12.19.4" /> <comment value="VisualAcuityDateTime" /> </mapping> </element> <element id="Observation.value[x]"> <path value="Observation.value[x]" /> <slicing> <discriminator> <type value="type" /> <path value="$this" /> </discriminator> <rules value="open" /> </slicing> </element> <element id="Observation.value[x]:valueQuantity"> <path value="Observation.value[x]" /> <sliceName value="valueQuantity" /> <short value="DecimalVisualAqcuity" /> <definition value="The measured decimal visual acuity." /> <comment value="Visual acuity is measured a dimensionless decimal. Therefore, a pattern with unit '1' is defined on `.valueQuantity`." /> <alias value="DecimaleVisusWaarde" /> <type> <code value="Quantity" /> </type> <patternQuantity> <system value="http://unitsofmeasure.org" /> <code value="1" /> </patternQuantity> <minValueQuantity> <value value="0" /> <system value="http://unitsofmeasure.org" /> <code value="1" /> </minValueQuantity> <maxValueQuantity> <value value="2" /> <system value="http://unitsofmeasure.org" /> <code value="1" /> </maxValueQuantity> <mapping> <identity value="zib-visualacuity-v1.0-2020EN" /> <map value="NL-CM:12.19.11" /> <comment value="VisualAcuity" /> </mapping> </element> <element id="Observation.bodySite"> <path value="Observation.bodySite" /> <definition value="The laterality of the eye of which the visual acuity has been measured." /> <comment value="The code on this element is added to make explicit what is implicit in the zib. See [ZIB-1442](https://bits.nictiz.nl/browse/ZIB-1442) for details." /> <type> <code value="CodeableConcept" /> <profile value="http://nictiz.nl/fhir/StructureDefinition/zib-AnatomicalLocation" /> </type> <patternCodeableConcept> <coding> <system value="http://snomed.info/sct" /> <code value="81745001" /> </coding> </patternCodeableConcept> </element> <element id="Observation.bodySite.extension:laterality"> <path value="Observation.bodySite.extension" /> <sliceName value="laterality" /> </element> <element id="Observation.bodySite.extension:laterality.value[x]"> <path value="Observation.bodySite.extension.value[x]" /> <short value="AnatomicalLocation" /> <definition value="The laterality of the eye of which the visual acuity has been measured." /> <alias value="AnatomischeLocatie" /> <mapping> <identity value="zib-visualacuity-v1.0-2020EN" /> <map value="NL-CM:12.19.5" /> <comment value="AnatomicalLocation" /> </mapping> </element> <element id="Observation.device"> <path value="Observation.device" /> <type> <code value="Reference" /> <targetProfile value="http://hl7.org/fhir/StructureDefinition/Device" /> <targetProfile value="http://hl7.org/fhir/StructureDefinition/DeviceMetric" /> <targetProfile value="http://nictiz.nl/fhir/StructureDefinition/zib-VisualAcuity.VisualAcuityMeasurementDevice" /> </type> </element> <element id="Observation.component"> <path value="Observation.component" /> <slicing> <discriminator> <type value="value" /> <path value="code" /> </discriminator> <rules value="open" /> </slicing> </element> <element id="Observation.component:visualAcuityType"> <path value="Observation.component" /> <sliceName value="visualAcuityType" /> <max value="1" /> </element> <element id="Observation.component:visualAcuityType.code"> <path value="Observation.component.code" /> <patternCodeableConcept> <coding> <system value="http://snomed.info/sct" /> <code value="16830007" /> </coding> </patternCodeableConcept> </element> <element id="Observation.component:visualAcuityType.value[x]"> <path value="Observation.component.value[x]" /> <short value="VisualAcuityType" /> <definition value="Type of visual acuity measurement." /> <alias value="VisusMetingType" /> <type> <code value="CodeableConcept" /> </type> <binding> <strength value="extensible" /> <valueSet value="http://decor.nictiz.nl/fhir/ValueSet/2.16.840.1.113883.2.4.3.11.60.40.2.12.19.2--20200901000000" /> </binding> <mapping> <identity value="zib-visualacuity-v1.0-2020EN" /> <map value="NL-CM:12.19.2" /> <comment value="VisualAcuityType" /> </mapping> </element> <element id="Observation.component:visualAcuityMeasurementChart"> <path value="Observation.component" /> <sliceName value="visualAcuityMeasurementChart" /> <max value="1" /> </element> <element id="Observation.component:visualAcuityMeasurementChart.code"> <path value="Observation.component.code" /> <patternCodeableConcept> <coding> <system value="http://snomed.info/sct" /> <code value="363691001" /> </coding> </patternCodeableConcept> </element> <element id="Observation.component:visualAcuityMeasurementChart.value[x]"> <path value="Observation.component.value[x]" /> <short value="VisualAcuityMeasurementChart" /> <definition value="The type of chart used for the visual acuity measurement." /> <alias value="VisusMetingKaart" /> <type> <code value="CodeableConcept" /> </type> <binding> <strength value="extensible" /> <valueSet value="http://decor.nictiz.nl/fhir/ValueSet/2.16.840.1.113883.2.4.3.11.60.40.2.12.19.3--20200901000000" /> </binding> <mapping> <identity value="zib-visualacuity-v1.0-2020EN" /> <map value="NL-CM:12.19.7" /> <comment value="VisualAcuityMeasurementChart" /> </mapping> </element> <element id="Observation.component:distanceFromChart"> <path value="Observation.component" /> <sliceName value="distanceFromChart" /> <max value="1" /> </element> <element id="Observation.component:distanceFromChart.code"> <path value="Observation.component.code" /> <comment value="This code aligns with the future version of this zib. See [ZIB-1441](https://bits.nictiz.nl/browse/ZIB-1441)." /> <patternCodeableConcept> <coding> <system value="http://snomed.info/sct" /> <code value="152731000146106" /> </coding> </patternCodeableConcept> </element> <element id="Observation.component:distanceFromChart.value[x]"> <path value="Observation.component.value[x]" /> <short value="DistanceFromChart" /> <definition value="Distance to the chart in meters" /> <alias value="AfstandTotKaart" /> <type> <code value="Quantity" /> </type> <patternQuantity> <system value="http://unitsofmeasure.org" /> <code value="m" /> </patternQuantity> <mapping> <identity value="zib-visualacuity-v1.0-2020EN" /> <map value="NL-CM:12.19.8" /> <comment value="DistanceFromChart" /> </mapping> </element> </differential> </StructureDefinition>

No narrative is provided for definitional resources. A human-readable rendering can be found in the implementation guide(s) where this resource is used.