Detection/discrimination in the long-wavelength pathways.
D003118:Color Perception / Q000502:physiology*; D004192:Discrimination, Psychological / Q000502:physiology*; D006801:Humans; D010786:Photoreceptor Cells / Q000502:physiology; D012684:Sensory Thresholds; D014795:Visual Pathways / Q000502:physiology