cone dystrophy

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cone dys·tro·phy

a retinal abnormality in which color perception is severely deficient and typical changes occur in electroretinogram. See: achromatopsia.
Synonym(s): cone degeneration
References in periodicals archive ?
Photophobia may be a presenting feature of the retinal dystrophies in general and an early and frequent symptom of cone dystrophy, (29) even before any visual loss is apparent.
c) Vision (nystagmus, photophobia, diminished acuity, if old enough for testing: cone dystrophy by ERG).
Recently, they've decided not to have children after tests revealed that if they have kids there is a 50/50 chance of the baby being born with rod and cone dystrophy, the same rare condition Dean suffers from.