[Influence of optotypes' contrast changes on visual acuity in automobile drivers].
When optotypes' contrast changes, one can see reliable difference with optotypes presentation on gray and dark gray background. Light gray background does not influence visual functions, there was no reliable difference. Authors point out possible forecasting of visual acuity decrease with optotypes' contrast changes--that is extremely important for occupational selection of automobile drivers, as dark gray background is major in dusty rainy weather when objects and traffic signs are hardly distinguishable.
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D000328:Adult; D015350:Contrast Sensitivity / Q000502:physiology*; D003623:Dark Adaptation / Q000502:physiology*; D006801:Humans; D008297:Male; D018986:Motor Vehicles; D016273:Occupational Exposure; D010775:Photic Stimulation; D011379:Prognosis; D012016:Reference Values; D014792:Visual Acuity / Q000502:physiology*