One of the mysteries of the English language finally explained.
A rare form of color-blindness resulting from insensitivity to blue light, causing confusion of greens and blues.Compare with protanopia
- ‘Sometimes tritanopia occurs due to disease, because the short wavelength cone is more fragile than the other cone types.’
- ‘Protanopia, deuteranopia and tritanopia are all types of dichromatism.’
- ‘With tritanopia, the person is deficient in blue and yellow perception, although he is still sensitive to red and green.’
- ‘A useful tool for reviewing information about color-blindness and checking legibility of images for color-blind users is Vischeck, an on-line tool that simulates the way an image or a website might appear to a user who has deuteranopia, protanopia, or tritanopia.’
- ‘Only about 0.005% of the population (male and female) are totally colour blind, and 0.003% have tritanopia, or blue-blindness.’
Early 20th century: from trito- ‘third’(referring to blue as the third colour in the spectrum) + an- ‘without’+ -opia.
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