Abstract
Rhesus monkeys trained to perform a visual task (Landolt ring discrimination) were exposed for 1000 sec to known amounts of 441 nm light by means of a 2500 W xenon lamp with narrow bandpass filter. Radiant exposures to the macula of 30 J/cm 2 did not impair vision, but 60 J/cm 2 produced a transient loss of 20/20 vision which lasted from 20 to 30 days. A radiant exposure of 90 J/cm 2 produced a permanent loss of 20/20 vision. These results, in addition to explaining solar retinitis and eclipse blindness, correlate well with the retinal photopathology of the short wavelength photochemical lesion.
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