<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="DhdCataractRefractie" />
  <url value="http://dhd.nl/fhir/StructureDefinition/DhdCataractRefractie" />
  <version value="0.1.1" />
  <name value="DhdCataractRefractie" />
  <status value="draft" />
  <description value="Refraction target as defined in proposed ZIB for Refractie.&#xD;&#xA;For the target refraction, only the Spherical Equivalent has to be filled in." />
  <purpose value="Bij afwijkende refractie vallen lichtstralen niet precies op het netvlies (ver- of bijziend), wat door middel van bril of lenzen is te corrigeren. Met een refractiemeting wordt de correctie (door middel van bril of lenzen) bepaald waarmee de patiënt optimaal kan zien." />
  <fhirVersion value="3.0.2" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Observation" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Observation" />
  <derivation value="constraint" />
  <snapshot />
  <differential>
    <element id="Observation.code.coding.system">
      <path value="Observation.code.coding.system" />
      <fixedUri value="http://snomed.info/sct" />
    </element>
    <element id="Observation.code.coding.code">
      <path value="Observation.code.coding.code" />
      <fixedCode value="251718005" />
    </element>
    <element id="Observation.subject">
      <path value="Observation.subject" />
      <min value="1" />
      <type>
        <code value="Reference" />
        <targetProfile value="http://dhd.nl/fhir/StructureDefinition/DhdCataractPatient" />
      </type>
    </element>
    <element id="Observation.effective[x]:effectiveDateTime">
      <path value="Observation.effectiveDateTime" />
      <sliceName value="effectiveDateTime" />
      <definition value="The time or time-period the observed value is asserted as being true. For biological subjects - e.g. human patients - this is usually called the physiologically relevant time&quot;. This is usually either the time of the procedure or of specimen collection, but very often the source of the date/time is not known, only the date/time itself." />
      <min value="1" />
      <type>
        <code value="dateTime" />
      </type>
    </element>
    <element id="Observation.value[x]">
      <path value="Observation.value[x]" />
      <max value="0" />
    </element>
    <element id="Observation.bodySite">
      <path value="Observation.bodySite" />
      <min value="1" />
    </element>
    <element id="Observation.bodySite.extension">
      <path value="Observation.bodySite.extension" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="url" />
        </discriminator>
        <rules value="open" />
      </slicing>
    </element>
    <element id="Observation.bodySite.extension:RefractionLaterality">
      <path value="Observation.bodySite.extension" />
      <sliceName value="RefractionLaterality" />
      <min value="1" />
      <max value="1" />
      <type>
        <code value="Extension" />
        <profile value="http://nictiz.nl/fhir/StructureDefinition/BodySite-Qualifier" />
      </type>
    </element>
    <element id="Observation.bodySite.extension:RefractionLaterality.valueCodeableConcept:valueCodeableConcept">
      <path value="Observation.bodySite.extension.valueCodeableConcept" />
      <sliceName value="valueCodeableConcept" />
      <binding>
        <strength value="extensible" />
        <description value="RefractionLateralityCodelist" />
        <valueSetUri value="http://dhd.nl/fhir/ValueSet/RefractieLateraliteitCodelijst" />
      </binding>
    </element>
    <element id="Observation.method.coding">
      <path value="Observation.method.coding" />
      <binding>
        <strength value="extensible" />
        <description value="RefractieMeetmethodeCodelijst" />
        <valueSetUri value="http://dhd.nl/fhir/ValueSet/RefractieMeetmethodeCodelijst" />
      </binding>
    </element>
    <element id="Observation.component">
      <path value="Observation.component" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="code.coding.code" />
        </discriminator>
        <rules value="open" />
      </slicing>
      <min value="1" />
    </element>
    <element id="Observation.component:SferischeEquivalent">
      <path value="Observation.component" />
      <sliceName value="SferischeEquivalent" />
      <short value="Sferische equivalent" />
      <max value="1" />
    </element>
    <element id="Observation.component:SferischeEquivalent.code">
      <path value="Observation.component.code" />
      <comment value="The code for refractive power is used here, since there is no good equivalent concept in Snomed CT." />
    </element>
    <element id="Observation.component:SferischeEquivalent.code.coding.system">
      <path value="Observation.component.code.coding.system" />
      <fixedUri value="http://snomed.info/sct" />
    </element>
    <element id="Observation.component:SferischeEquivalent.code.coding.code">
      <path value="Observation.component.code.coding.code" />
      <fixedCode value="251718005" />
    </element>
    <element id="Observation.component:SferischeEquivalent.value[x]:valueQuantity">
      <path value="Observation.component.valueQuantity" />
      <sliceName value="valueQuantity" />
      <min value="1" />
      <type>
        <code value="Quantity" />
      </type>
    </element>
    <element id="Observation.component:SferischeEquivalent.value[x]:valueQuantity.value">
      <path value="Observation.component.valueQuantity.value" />
      <min value="1" />
    </element>
    <element id="Observation.component:SferischeEquivalent.value[x]:valueQuantity.system">
      <path value="Observation.component.valueQuantity.system" />
      <fixedUri value="http://unitsofmeasure.org" />
    </element>
    <element id="Observation.component:SferischeEquivalent.value[x]:valueQuantity.code">
      <path value="Observation.component.valueQuantity.code" />
      <fixedCode value="[diop]" />
    </element>
    <element id="Observation.component:SferischeRefractieWaarde">
      <path value="Observation.component" />
      <sliceName value="SferischeRefractieWaarde" />
      <short value="Sferische refractiewaarde" />
      <max value="1" />
    </element>
    <element id="Observation.component:SferischeRefractieWaarde.code.coding.system">
      <path value="Observation.component.code.coding.system" />
      <fixedUri value="http://snomed.info/sct" />
    </element>
    <element id="Observation.component:SferischeRefractieWaarde.code.coding.code">
      <path value="Observation.component.code.coding.code" />
      <fixedCode value="251795007" />
    </element>
    <element id="Observation.component:SferischeRefractieWaarde.value[x]:valueQuantity">
      <path value="Observation.component.valueQuantity" />
      <sliceName value="valueQuantity" />
      <min value="1" />
      <type>
        <code value="Quantity" />
      </type>
    </element>
    <element id="Observation.component:SferischeRefractieWaarde.value[x]:valueQuantity.value">
      <path value="Observation.component.valueQuantity.value" />
      <min value="1" />
    </element>
    <element id="Observation.component:SferischeRefractieWaarde.value[x]:valueQuantity.system">
      <path value="Observation.component.valueQuantity.system" />
      <fixedUri value="http://unitsofmeasure.org" />
    </element>
    <element id="Observation.component:SferischeRefractieWaarde.value[x]:valueQuantity.code">
      <path value="Observation.component.valueQuantity.code" />
      <fixedCode value="[diop]" />
    </element>
    <element id="Observation.component:CilindrischeRefractieWaarde">
      <path value="Observation.component" />
      <sliceName value="CilindrischeRefractieWaarde" />
      <short value="Cilindrische refractiewaarde" />
      <max value="1" />
    </element>
    <element id="Observation.component:CilindrischeRefractieWaarde.code.coding.system">
      <path value="Observation.component.code.coding.system" />
      <fixedUri value="http://snomed.info/sct" />
    </element>
    <element id="Observation.component:CilindrischeRefractieWaarde.code.coding.code">
      <path value="Observation.component.code.coding.code" />
      <fixedCode value="251797004" />
    </element>
    <element id="Observation.component:CilindrischeRefractieWaarde.value[x]:valueQuantity">
      <path value="Observation.component.valueQuantity" />
      <sliceName value="valueQuantity" />
      <min value="1" />
      <type>
        <code value="Quantity" />
      </type>
    </element>
    <element id="Observation.component:CilindrischeRefractieWaarde.value[x]:valueQuantity.value">
      <path value="Observation.component.valueQuantity.value" />
      <min value="1" />
    </element>
    <element id="Observation.component:CilindrischeRefractieWaarde.value[x]:valueQuantity.system">
      <path value="Observation.component.valueQuantity.system" />
      <fixedUri value="http://unitsofmeasure.org" />
    </element>
    <element id="Observation.component:CilindrischeRefractieWaarde.value[x]:valueQuantity.code">
      <path value="Observation.component.valueQuantity.code" />
      <fixedCode value="[diop]" />
    </element>
    <element id="Observation.component:CilindrischeRefractieAs">
      <path value="Observation.component" />
      <sliceName value="CilindrischeRefractieAs" />
      <short value="Cilindrische refractie-as" />
      <max value="1" />
    </element>
    <element id="Observation.component:CilindrischeRefractieAs.code.coding.system">
      <path value="Observation.component.code.coding.system" />
      <fixedUri value="http://snomed.info/sct" />
    </element>
    <element id="Observation.component:CilindrischeRefractieAs.code.coding.code">
      <path value="Observation.component.code.coding.code" />
      <fixedCode value="251799001" />
    </element>
    <element id="Observation.component:CilindrischeRefractieAs.value[x]:valueQuantity">
      <path value="Observation.component.valueQuantity" />
      <sliceName value="valueQuantity" />
      <min value="1" />
      <type>
        <code value="Quantity" />
      </type>
    </element>
    <element id="Observation.component:CilindrischeRefractieAs.value[x]:valueQuantity.value">
      <path value="Observation.component.valueQuantity.value" />
      <min value="1" />
    </element>
    <element id="Observation.component:CilindrischeRefractieAs.value[x]:valueQuantity.system">
      <path value="Observation.component.valueQuantity.system" />
      <fixedUri value="http://unitsofmeasure.org" />
    </element>
    <element id="Observation.component:CilindrischeRefractieAs.value[x]:valueQuantity.code">
      <path value="Observation.component.valueQuantity.code" />
      <fixedCode value="deg" />
    </element>
    <element id="Observation.component:LeesAdditie">
      <path value="Observation.component" />
      <sliceName value="LeesAdditie" />
      <short value="Lees additie" />
      <max value="1" />
    </element>
    <element id="Observation.component:LeesAdditie.code.coding.system">
      <path value="Observation.component.code.coding.system" />
      <fixedUri value="http://snomed.info/sct" />
    </element>
    <element id="Observation.component:LeesAdditie.code.coding.code">
      <path value="Observation.component.code.coding.code" />
      <fixedCode value="251796008" />
    </element>
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      <path value="Observation.component.valueQuantity" />
      <sliceName value="valueQuantity" />
      <min value="1" />
      <type>
        <code value="Quantity" />
      </type>
    </element>
    <element id="Observation.component:LeesAdditie.value[x]:valueQuantity.value">
      <path value="Observation.component.valueQuantity.value" />
      <min value="1" />
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      <path value="Observation.component.valueQuantity.system" />
      <fixedUri value="http://unitsofmeasure.org" />
    </element>
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      <path value="Observation.component.valueQuantity.code" />
      <fixedCode value="[diop]" />
    </element>
    <element id="Observation.component:PrismaWaarde">
      <path value="Observation.component" />
      <sliceName value="PrismaWaarde" />
      <short value="Prisma-waarde" />
      <max value="1" />
    </element>
    <element id="Observation.component:PrismaWaarde.code.coding.system">
      <path value="Observation.component.code.coding.system" />
      <fixedUri value="http://snomed.info/sct" />
    </element>
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      <path value="Observation.component.code.coding.code" />
      <fixedCode value="251762001" />
    </element>
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      <path value="Observation.component.valueQuantity" />
      <sliceName value="valueQuantity" />
      <min value="1" />
      <type>
        <code value="Quantity" />
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    <element id="Observation.component:PrismaWaarde.value[x]:valueQuantity.value">
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      <min value="1" />
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      <path value="Observation.component.valueQuantity.system" />
      <fixedUri value="http://unitsofmeasure.org" />
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      <path value="Observation.component.valueQuantity.code" />
      <fixedCode value="[diop]" />
    </element>
    <element id="Observation.component:PrismaBasis">
      <path value="Observation.component" />
      <sliceName value="PrismaBasis" />
      <max value="1" />
    </element>
    <element id="Observation.component:PrismaBasis.code.coding.system">
      <path value="Observation.component.code.coding.system" />
      <fixedUri value="http://snomed.info/sct" />
    </element>
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      <sliceName value="valueQuantity" />
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      <type>
        <code value="Quantity" />
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    </element>
    <element id="Observation.component:PrismaBasis.value[x]:valueQuantity.value">
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      <min value="1" />
    </element>
    <element id="Observation.component:PrismaBasis.value[x]:valueQuantity.system">
      <path value="Observation.component.valueQuantity.system" />
      <fixedUri value="http://unitsofmeasure.org" />
    </element>
    <element id="Observation.component:PrismaBasis.value[x]:valueQuantity.code">
      <path value="Observation.component.valueQuantity.code" />
      <fixedCode value="deg" />
    </element>
  </differential>
</StructureDefinition>