Cyanopsia


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A cause of blue-yellow CVD, simply described as a bluing of the vision. This constitutes a Tetartan defect, albeit non-congenital. The biggest causes are drug toxicity (e.g. Sildenafil, AKA Viagra), or as the result of cataract removal, since natural lenses are slightly yellow-tinted and artificial lenses are not.

See also Xanthopsia.

Claude Monet’s paintings showed the likely effects of Cyanopsia after receiving cataract surgery.

Two of Monet’s paintings of the same location before (A; 1922) and after (B:1924) cataract surgery.