Definition of "achromatopsia" []

• Achromatopia (noun)

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• "I have achromatopsia, so I see everything in grayscale."
• "Standard examples from the study of vision include prosopagnosia (impaired face recognition), achromatopsia"
• "Mr Nordby featured in the Oliver Sacks series The Mind Traveller, when he accompanied Dr Sacks to Pingelap Atoll (the title topic of his book The Island of the Colour Blind) where due to a limited gene-pool some 10% of the population have achromatopsia."