This page is part of the HL7 FHIR® Implementation Guide: Ophthalmology Retinal, Release 1 (v0.1.0: STU1 Ballot 1) based on FHIR R4. . For a full list of available versions, see the Directory of published versions

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: Visual field test parameter observations - XML Representation

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<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="visual-field-observations"/>
  <text>
    <status value="generated"/>
    <div xmlns="http://www.w3.org/1999/xhtml">
      <h2>Visual field test parameter obsevations</h2>
    </div>
  </text>
  <url
       value="http://hl7.org/fhir/uv/eyecare/CodeSystem/visual-field-observations"/>
  <version value="0.1.0"/>
  <name value="OphthalmologyVisualFieldObservations"/>
  <title value="Visual field test parameter observations"/>
  <status value="draft"/>
  <date value="2021-08-07"/>
  <publisher value="HL7 International - Patient Care WG"/>
  <contact>
    <name value="HL7 International - Patient Care"/>
    <telecom>
      <system value="url"/>
      <value value="http://www.hl7.org/Special/committees/patientcare"/>
    </telecom>
  </contact>
  <description value="Visual field observation additional codes"/>
  <jurisdiction>
    <coding>
      <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/>
      <code value="001"/>
    </coding>
  </jurisdiction>
  <copyright value="HL7"/>
  <caseSensitive value="true"/>
  <compositional value="false"/>
  <versionNeeded value="true"/>
  <content value="complete"/>
  <concept>
    <code value="400204"/>
    <display value="Fixation loss"/>
    <definition
                value="Fixation loss occurs when the patient reports seeing a stimulus that is presented in the predicted area of the physiologic blind spot"/>
  </concept>
  <concept>
    <code value="400202"/>
    <display value="False positive percent"/>
    <definition value="Percentage of false positive responses"/>
  </concept>
  <concept>
    <code value="400203"/>
    <display value="False negative percent"/>
    <definition value="Percentage of false negative reponses"/>
  </concept>
  <concept>
    <code value="400205"/>
    <display value="False positive ratio"/>
    <definition value="Ratio of false positive responses to total responses"/>
  </concept>
  <concept>
    <code value="400206"/>
    <display value="False negative ratio"/>
    <definition value="Ratio of false negative responses to total responses"/>
  </concept>
</CodeSystem>