A chronic hereditary eye disease characterized by black pigmentation and gradual degeneration of the retina.
- Bryant has retinitis pigmentosa, an eye disease that has blinded four generations of her family.
- Homer has been legally blind since the age of 35 as a result of retinitis pigmentosa and glaucoma.
- Millions of people around the world live in a blurry or darkened world because of eye diseases such as macular degeneration or retinitis pigmentosa.
Mid 19th century: pigmentosa, feminine of Latin pigmentosus, from pigmentum 'pigment'.
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