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deuteranopia Syllabification: deu·ter·a·no·pi·a
Pronunciation: /ˌd(y)o͞odərəˈnōpēə/

Definition of deuteranopia in English:


Color-blindness resulting from insensitivity to green light, causing confusion of greens, reds, and yellows. Compare with protanopia.
Example sentences
  • 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.
  • Red-green deficiency (deuteranopia) is the most frequently diagnosed deficiency.
  • But it's important to remember that a measurable percentage of men have red-green colorblindness (deuteranopia); instructing them to click the green box for yes or the red box for no, for example, should be avoided.


Early 20th century: from deutero- 'second' (the color green being regarded as the second component of color vision) + an-1 + -opia.

Definition of deuteranopia in:
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