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Science 29 October 1971:
Vol. 174. no. 4008, pp. 520 - 523
DOI: 10.1126/science.174.4008.520
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Articles

Prolonged Color Blindness Induced by Intense Spectral Lights in Rhesus Monkeys

R. S. Harwerth 1 and H. G. Sperling 1

1 University of Texas Graduate School of Biomedical Sciences, Houston 77025

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.


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Science. ISSN 0036-8075 (print), 1095-9203 (online)