title: Three pigments in normal and anomalous color vision.
mesh_terms: D003118:Color Perception; D003119:Color Perception Tests; D003117:Color Vision Defects / Q000209:etiology*; D006801:Humans; D008027:Light; D008433:Mathematics; D010775:Photic Stimulation; D012168:Retinal Pigments / Q000502:physiology*
chemical_list: D012168:Retinal Pigments