Visual Fatigue in Sonar Control Rooms Lighted by Red, White, or Blue Illumination

Abstract
Eye movements were recorded and performance measured for subjects monitoring a simulated sonar display for an hour in red, white, or blue illumination. Subjects were four young individuals with normal vision and four older far-sighted individuals; the latter were chosen since they should be most subject to visual problems under red illumination. There was no difference in visual performance over time for either group. There were however indications of fatigue for the hyperopes in red illumination. In one hour of monitoring the displays, none of the subjects showed evidence of fatigue in blue or white light.

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