A tetrachromatic hypothesis for human color vision.
D000221:Adaptation, Ocular; D000360:Afterimage; D003118:Color Perception; D003119:Color Perception Tests; D003117:Color Vision Defects / Q000503:physiopathology; D006801:Humans; D008266:Macula Lutea / Q000502:physiology; D010786:Photoreceptor Cells / Q000032:analysis; D012168:Retinal Pigments
D012168:Retinal Pigments