tritanopiayoudaoicibaDictYouDict[tritanopia 词源字典]
"A rare form of colour blindness resulting from insensitivity to blue light, causing confusion of greens and blues", Early 20th century: from trito- 'third' (referring to blue as the third colour in the spectrum) + an-1 'without' + -opia.[tritanopia etymology, tritanopia origin, 英语词源]