trichromasy Ophthalm.
(traɪˈkrəʊməsɪ)
Also -chromacy.
[f. tri- + Gr. χρῶµα colour: see -y3.]
Colour vision in which three pure colours, in different combinations, are required to match all the colours that can be perceived (as in normal vision).
| 1911 Amer. Jrnl. Psychol. XXII. 371 Guttmann..identifies color-weakness with anomalous trichromacy. 1923 Proc. R. Soc. CII. 359 Trichromasy, in my experience, seems to approach monochromasy directly without passing through dichromasy as an intermediate stage. 1973 [see protanomaly]. 1980 Nature 27 Mar. 306/1 Our trichromacy has a ‘blue’ channel that is about 100 times less sensitive than the ‘red’ and ‘green’ channels. |