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The author points out in his preface that "occupational efficiency is a variable dependent upon many other variables." Among these variables that influence efficiency are "the sight of the worker, the kind of things that have to be seen and the lighting intended to reveal them." He proceeds to elaborate on these influences in a competent manner and in terms suited to the intelligent layman.
The subjects covered are the sense of sight, the causes and symptoms of eyestrain, occupational demands on sight, the facilitation of visual tasks, lighting and visual efficiency, incentive luminescence and color, testing sight for work and protection of sight at work. The author has freely consulted experts in their respective and pertinent fields to insure the accuracy of his statements, for example, such authorities as Sir Stewart Duke-Elder and Sir John Parsons, with the result that here is a reliable and conclusive book, well illustrated
Sight, Light and Efficiency. JAMA. 1950;143(17):1530. doi:10.1001/jama.1950.02910520072042
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