achromatopsia -- Britannica Online Encyclopedia
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Britannica online encyclopedia article on achromatopsia:Acquired colour blindness is usually of the blue-yellow type and can be due to retinal diseases, glaucoma, or optic nerve diseases. Total colour blindness (achromatopsia) is an extremely rare congenital affliction that is typically associated with poor vision, nystagmus (rapid, uncontrollable eye... achromatopsia, encyclopedia, encyclopaedia, britannica, article |
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