defective colour vision
anomaly of vision in which there is a reduced ability to discriminate between some or all colours
Note 1 to entry: Types of defective colour vision include
– anomalous trichromatism: deuteranomaly, protanomaly and tritanomaly;
– dichromatism: deuteranopia, protanopia and tritanopia;
Note 2 to entry: This entry was numbered 845-02-13 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-287 in CIE S 017:2011.