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September 9, 1922


JAMA. 1922;79(11):909. doi:10.1001/jama.1922.02640110049020

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Lessened Ability to Distinguish Colors as a Sign of Fatigue  As the result of the systematic examination of athletes following various forms of physical exertion, it has been shown that as the body becomes fatigued the ability to distinguish colors becomes much diminished. According to Boehmig, who has an article on the subject in the Münchener medizinische Wochenschrift, certain subjects who, when examined immediately before the physical performance, were found to possess a perfectly normal ability to distinguish colors, were unable, after the body became fatigued, to recognize the color of very small red and green objects, and some presented transient scotomas, which, however, were of a mild sort, so that the subjects were frequently not aware of their existence. In the case of heavy smokers and those addicted to alcohol, the manifestations appeared in a more marked form. The so-called fatigue substances will doubtless have to be assumed to

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