<?xml version="1.0" encoding="UTF-8"?>

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="space-visual-effects-cs"/>
  <text>
    <status value="generated"/><div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: CodeSystem space-visual-effects-cs</b></p><a name="space-visual-effects-cs"> </a><a name="hcspace-visual-effects-cs"> </a><p>This case-sensitive code system <code>https://mitre.org/fhir/space-health/CodeSystem/space-visual-effects-cs</code> defines the following codes:</p><table class="codes"><tr><td style="white-space:nowrap"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td style="white-space:nowrap">sans<a name="space-visual-effects-cs-sans"> </a></td><td>Spaceflight-Associated Neuro-ocular Syndrome</td><td>A constellation of ocular and brain findings in astronauts exposed to long-duration spaceflight, including optic disc edema, globe flattening, choroidal folds, and hyperopic shifts</td></tr><tr><td style="white-space:nowrap">optic-disc-edema<a name="space-visual-effects-cs-optic-disc-edema"> </a></td><td>Optic Disc Edema</td><td>Swelling of the optic disc observed in astronauts during long-duration spaceflight</td></tr><tr><td style="white-space:nowrap">posterior-globe-flattening<a name="space-visual-effects-cs-posterior-globe-flattening"> </a></td><td>Posterior Globe Flattening</td><td>Flattening of the posterior portion of the eye globe observed in astronauts during spaceflight</td></tr><tr><td style="white-space:nowrap">choroidal-folds<a name="space-visual-effects-cs-choroidal-folds"> </a></td><td>Choroidal Folds</td><td>Folds in the choroidal layer of the eye observed in astronauts during spaceflight</td></tr><tr><td style="white-space:nowrap">hyperopic-shift<a name="space-visual-effects-cs-hyperopic-shift"> </a></td><td>Hyperopic Shift</td><td>A shift toward farsightedness observed in astronauts during spaceflight</td></tr><tr><td style="white-space:nowrap">space-radiation-cataracts<a name="space-visual-effects-cs-space-radiation-cataracts"> </a></td><td>Space Radiation Cataracts</td><td>Cataracts resulting from exposure to space radiation</td></tr><tr><td style="white-space:nowrap">light-flash-phenomenon<a name="space-visual-effects-cs-light-flash-phenomenon"> </a></td><td>Light Flash Phenomenon</td><td>Visual perception of flashes of light caused by cosmic rays interacting with the retina or visual cortex</td></tr><tr><td style="white-space:nowrap">retinal-vascular-changes<a name="space-visual-effects-cs-retinal-vascular-changes"> </a></td><td>Retinal Vascular Changes</td><td>Changes in the blood vessels of the retina observed during spaceflight</td></tr></table></div>
  </text>
  <url value="https://mitre.org/fhir/space-health/CodeSystem/space-visual-effects-cs"/>
  <version value="0.5.12"/>
  <name value="SpaceVisualEffectsCodeSystem"/>
  <title value="Space Visual Effects"/>
  <status value="draft"/>
  <experimental value="true"/>
  <date value="2026-03-25T00:24:16-05:00"/>
  <publisher value="MITRE"/>
  <contact>
    <name value="MITRE"/>
    <telecom>
      <system value="url"/>
      <value value="https://www.mitre.org/"/>
    </telecom>
  </contact>
  <description value="CodeSystem for space visual effects not found in SNOMED CT"/>
  <caseSensitive value="true"/>
  <content value="complete"/>
  <count value="8"/>
  <concept>
    <code value="sans"/>
    <display value="Spaceflight-Associated Neuro-ocular Syndrome"/>
    <definition value="A constellation of ocular and brain findings in astronauts exposed to long-duration spaceflight, including optic disc edema, globe flattening, choroidal folds, and hyperopic shifts"/>
  </concept>
  <concept>
    <code value="optic-disc-edema"/>
    <display value="Optic Disc Edema"/>
    <definition value="Swelling of the optic disc observed in astronauts during long-duration spaceflight"/>
  </concept>
  <concept>
    <code value="posterior-globe-flattening"/>
    <display value="Posterior Globe Flattening"/>
    <definition value="Flattening of the posterior portion of the eye globe observed in astronauts during spaceflight"/>
  </concept>
  <concept>
    <code value="choroidal-folds"/>
    <display value="Choroidal Folds"/>
    <definition value="Folds in the choroidal layer of the eye observed in astronauts during spaceflight"/>
  </concept>
  <concept>
    <code value="hyperopic-shift"/>
    <display value="Hyperopic Shift"/>
    <definition value="A shift toward farsightedness observed in astronauts during spaceflight"/>
  </concept>
  <concept>
    <code value="space-radiation-cataracts"/>
    <display value="Space Radiation Cataracts"/>
    <definition value="Cataracts resulting from exposure to space radiation"/>
  </concept>
  <concept>
    <code value="light-flash-phenomenon"/>
    <display value="Light Flash Phenomenon"/>
    <definition value="Visual perception of flashes of light caused by cosmic rays interacting with the retina or visual cortex"/>
  </concept>
  <concept>
    <code value="retinal-vascular-changes"/>
    <display value="Retinal Vascular Changes"/>
    <definition value="Changes in the blood vessels of the retina observed during spaceflight"/>
  </concept>
</CodeSystem>