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protanopia Syllabification: pro·ta·no·pi·a
Pronunciation: /ˌprōdəˈnōpēə/

Definition of protanopia in English:


Color-blindness resulting from insensitivity to red light, causing confusion of greens, reds, and yellows. It is hereditary and is the most common form of color-blindness. Also called daltonism. Compare with deuteranopia, tritanopia.
Example sentences
  • Someone pointed out to us yesterday that the current things colour scheme is far from ideal if you suffer from protanopia, deutanopia or tritanopia - colour blindness.
  • The genetic cause has been determined for several color vision defects, achromatopsia (the loss of all color vision), blue monochromatism, protanopia, deuteranopia, and enhanced S-cone syndrome.


Early 20th century: from proto- 'original' (red being regarded as the first component of color vision) + an-1 'lacking' + -opia.

Definition of protanopia in:
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