title: Relation of macular pigment and photoreceptor distribution to the perception of a brightness difference.
mesh_terms: D000221:Adaptation, Ocular; D000328:Adult; D003118:Color Perception; D003119:Color Perception Tests / Q000295:instrumentation; D006801:Humans; D008027:Light; D008266:Macula Lutea / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D010786:Photoreceptor Cells / Q000502:physiology; D012168:Retinal Pigments / Q000502:physiology*
chemical_list: D012168:Retinal Pigments