title: Prolonged color blindness induced by intense spectral lights in rhesus monkeys.
abstract: Prolonged exposure of rhesus monkeys to intense blue light produces long-term changes which are consistent with loss of response of those cones that contain a photopigment with peak absorption at 445 nanometers. The 90 percent reduction of spectral sensitivity in the blue region has lasted more than 5 months. Reduced sensitivity to long wavelengths is produced by adaptation to light of 520 nanometers. This reduced sensitivity, which lasts no more than 30 days, is attributed to a temporary loss of response of the cones containing a photopigment with peak absorption at 535 nanometers.
mesh_terms: D000818:Animals; D003116:Color; D003117:Color Vision Defects / Q000209:etiology* / Q000503:physiopathology; D003216:Conditioning, Operant; D000882:Haplorhini; D008027:Light / Q000009:adverse effects*; D008251:Macaca; D010786:Photoreceptor Cells / Q000503:physiopathology; D013997:Time Factors