Basic concepts of color vision.
D003116:Color; D003118:Color Perception; D006801:Humans; D008027:Light; D009799:Ocular Physiological Phenomena; D010786:Photoreceptor Cells / Q000502:physiology; D012168:Retinal Pigments / Q000502:physiology; D013053:Spectrophotometry
D012168:Retinal Pigments