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"very-frequent", "url": "https://dantelabs.com/traits/abnormal-retinal-vascular-morphology" }, { "slug": "blindness", "name": "Blindness", "systems": [ "abnormality-of-the-eye" ], "frequency": "very-frequent", "url": "https://dantelabs.com/traits/blindness" }, { "slug": "keratoconus", "name": "Bulging cornea", "systems": [ "abnormality-of-the-eye" ], "frequency": "frequent", "url": "https://dantelabs.com/traits/keratoconus" }, { "slug": "conductive-hearing-impairment", "name": "Conductive deafness", "systems": [ "abnormality-of-the-ear" ], "frequency": "very-frequent", "url": "https://dantelabs.com/traits/conductive-hearing-impairment" }, { "slug": "cystoid-macular-edema", "name": "Cystoid macular edema", "systems": [ "abnormality-of-the-eye" ], "frequency": "frequent", "url": "https://dantelabs.com/traits/cystoid-macular-edema" }, { "slug": "reduced-visual-acuity", "name": "Decreased clarity of vision", "systems": [ "abnormality-of-the-eye" ], "frequency": "occasional", "url": 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"url": "https://dantelabs.com/traits/hyperinsulinemia" }, { "slug": "nystagmus", "name": "Involuntary, rapid, rhythmic eye movements", "systems": [ "abnormality-of-the-eye" ], "frequency": "very-frequent", "url": "https://dantelabs.com/traits/nystagmus" }, { "slug": "peripheral-visual-field-loss", "name": "Loss of peripheral vision", "systems": [ "abnormality-of-the-eye" ], "frequency": "obligate", "url": "https://dantelabs.com/traits/peripheral-visual-field-loss" }, { "slug": "macular-degeneration", "name": "Macular degeneration", "systems": [ "abnormality-of-the-eye" ], "frequency": "occasional", "url": "https://dantelabs.com/traits/macular-degeneration" }, { "slug": "attenuation-of-retinal-blood-vessels", "name": "Narrowing of blood vessels in back of eye", "systems": [ "abnormality-of-the-cardiovascular-system", "abnormality-of-the-eye" ], "frequency": "frequent", "url": "https://dantelabs.com/traits/attenuation-of-retinal-blood-vessels" }, { "slug": "optic-atrophy", "name": "Optic 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