The visual fatigue-affecting conditions of the classes of a higher educational institute were examined in students. The authors determined the light level of working places and its compliance with hygienic regulations of the factors influencing the students' visual perception. They analyzed and identified avoidable causes of variance of the light level and conjugate variables. Guidelines for optimizing the light level have been developed, by taking into account the lowest required tangible cost. A program of organizational actions, which aimed at following the sanitary-and-hygienic specifications at higher school, has been worked out.
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