{
  "url": "https://dantelabs.com/traits/ultra-low-vision",
  "trait": {
    "bundleId": "2026.10.19-9814e911",
    "release": "2026-09-01",
    "slug": "ultra-low-vision",
    "id": "HP:0032123",
    "name": "Ultra-low vision",
    "definition": "Best corrected visual acuity worse than 1.90 logMAR (roughly 20/1590).",
    "synonyms": [],
    "systems": [
      {
        "slug": "abnormality-of-the-eye",
        "name": "Abnormality of the eye",
        "url": "https://dantelabs.com/traits/abnormality-of-the-eye"
      }
    ],
    "broader": [
      {
        "slug": "reduced-visual-acuity",
        "name": "Decreased clarity of vision",
        "url": "https://dantelabs.com/traits/reduced-visual-acuity"
      }
    ],
    "narrower": [
      {
        "slug": "ultra-low-vision-with-retained-light-perception",
        "name": "Ultra-low vision with retained light perception",
        "genes": 5,
        "url": "https://dantelabs.com/traits/ultra-low-vision-with-retained-light-perception"
      },
      {
        "slug": "ultra-low-vision-with-no-light-perception",
        "name": "Ultra-low vision with no light perception",
        "genes": 1,
        "url": "https://dantelabs.com/traits/ultra-low-vision-with-no-light-perception"
      },
      {
        "slug": "ultra-low-vision-with-retained-light-projection",
        "name": "Ultra-low vision with retained light projection",
        "genes": 1,
        "url": "https://dantelabs.com/traits/ultra-low-vision-with-retained-light-projection"
      },
      {
        "slug": "ultra-low-vision-with-retained-motion-projection",
        "name": "Ultra-low vision with retained motion projection",
        "genes": 1,
        "url": "https://dantelabs.com/traits/ultra-low-vision-with-retained-motion-projection"
      }
    ],
    "genes": [
      {
        "slug": "fdxr",
        "symbol": "FDXR",
        "hgnc": "HGNC:3642",
        "name": "ferredoxin reductase",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/fdxr"
      },
      {
        "slug": "nmnat1",
        "symbol": "NMNAT1",
        "hgnc": "HGNC:17877",
        "name": "nicotinamide nucleotide adenylyltransferase 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/nmnat1"
      }
    ]
  }
}