[Chromatopsia]

A total of 277 chromatopsia cases (0.09 percent of the total number) are analyzed, including erythropsia, xanthopsia, cyanopsia, chloropsia, and polychromatopsia. True chromatopsia and chromatopsia due to staining of optic media of the eyes were distinguished and an attempt to explain this entoptic phenomenon made. True chromatopsias are related to depression of stimulation of the optic nerve route.