Prolonged Color Blindness Induced by Intense Spectral Lights in Rhesus Monkeys

See allHide authors and affiliations

Science  29 Oct 1971:
Vol. 174, Issue 4008, pp. 520-523
DOI: 10.1126/science.174.4008.520


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.