HL7 FHIR® Implementation Guide: Ophthalmology Retinal, Release 1
0.1.0 - STU 1 Ballot

HL7 FHIR® Implementation Guide: Ophthalmology Retinal, Release 1, published by HL7 International - Patient Care WG. This is not an authorized publication; it is the continuous build for version 0.1.0). This version is based on the current content of https://github.com/HL7/fhir-eyecare-ig/ and changes regularly. See the Directory of published versions

## : 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://terminolgy.hl7.org/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>