The control of sensitivity in the retina.
D000818:Animals; D008027:Light; D010786:Photoreceptor Cells / Q000166:cytology / Q000502:physiology*; D012160:Retina / Q000166:cytology / Q000502:physiology*; D012168:Retinal Pigments; D009435:Synaptic Transmission; D014562:Caudata
D012168:Retinal Pigments