title: Trichromatic vision in the cat.
abstract: Many cat retinal ganglion cells (types X, Y, and W) have inputs from three separate cone systems. Those with peak sensitivities at 450 and 555 nanometers have been previously shown. A gamma max cone with a peak sensitivity of 500 nanometers can be differentiated from other cones by spectral sensitivity and from rods by receptive field differences, functioning above rod saturation levels, and by cone-rod breaks in the dark-adaptation curves. The similarity of the three-cone cat retina to the extramacular retina of the rhesus monkeys suggests that the cat may have photopic trichromatic vision.
mesh_terms: D000200:Action Potentials; D000818:Animals; D002415:Cats / Q000502:physiology*; D003118:Color Perception; D003623:Dark Adaptation; D005071:Evoked Potentials; D005724:Ganglia / Q000502:physiology; D010775:Photic Stimulation; D010786:Photoreceptor Cells / Q000502:physiology; D012160:Retina / Q000294:innervation / Q000502:physiology; D014785:Vision, Ocular