Processing of intensity and wavelength information by the visual system.
D000818:Animals; D002415:Cats; D003118:Color Perception; D005829:Geniculate Bodies / Q000502:physiology*; D000882:Haplorhini; D008251:Macaca; D010786:Photoreceptor Cells / Q000502:physiology; D012160:Retina / Q000166:cytology / Q000502:physiology*; D013045:Species Specificity; D009435:Synaptic Transmission