There is no organ of the body, outside of that limited group which is absolutely indispensable for the maintenance of life, which contributes more to human efficiency and personal comfort than does the eye. When we stop to consider the prolonged demands made on the organs of vision in these days of printing, and the shameful indifference with which their conservation is treated, it is surprising that they do not fail in their task more frequently than is actually the case. The muscular and nervous systems give a warning when they are called on in undue measure. Premonitory symptoms of fatigue or pain serve to prevent harmful overexertion. But our eyes rarely receive any studied consideration except at long intervals, and then usually under the pressure of impending damage to sight; nor are we concerned as a rule with any adjustment of the needs of the visual apparatus so as
LIGHTING AND EYE-STRAIN. JAMA. 1914;LXIII(6):484. doi:10.1001/jama.1914.02570060044015
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