achromatopsia

• achromatopsy

From German Achromatopsie, from Ancient Greek ἀχρώματος (akhrṓmatos), from ἀ- (a-, “without”) +‎ χρῶμα (khrôma, “color”), + -opsie. By surface analysis, a- +‎ chromato- +‎ -opsia.

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achromatopsia (countable and uncountable, plural achromatopsias)

2. Total color blindness; the total inability to distinguish colors due to the absence of cone cells in the eyes.

   Synonyms: achromatism, achromatopsy, achromatopia

• Dorland's Pocket Medical Dictionary, 22nd edition, W. B. Saunders, 1977

• achromatopias