Definition of tritanopia in English:

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Pronunciation: /ˌtrɪtəˈnəʊpɪə/


[mass noun]
A rare form of colour blindness resulting from insensitivity to blue light, causing confusion of greens and blues. Compare with protanopia.
Example sentences
  • Protanopia, deuteranopia and tritanopia are all types of dichromatism.
  • Sometimes tritanopia occurs due to disease, because the short wavelength cone is more fragile than the other cone types.
  • With tritanopia, the person is deficient in blue and yellow perception, although he is still sensitive to red and green.


Early 20th century: from trito- 'third' (referring to blue as the third colour in the spectrum) + an-1 'without' + -opia.

For editors and proofreaders

Line breaks: trit¦an|opia

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