Light and dark adaptation.
D000221:Adaptation, Ocular; D003623:Dark Adaptation; D004594:Electrophysiology; D006801:Humans; D010786:Photoreceptor Cells / Q000502:physiology; D012160:Retina / Q000502:physiology; D012168:Retinal Pigments / Q000502:physiology; D013053:Spectrophotometry; D014787:Vision Tests
D012168:Retinal Pigments