Abstract
Introduction: Users of yellow-tinted lenses and filters subjectively report some or all of the following benefits: increased brightness perception (≤40%; increased figure-ground ability; increased overall clarity of vision; increased patient comfort during eye exams; decreased discomfort glare.
Purpose: To investigate the mechanism of efficacy, if any, of Gunnar Optiks “digital eyewear”. Zone Quick tear film, orbicularis EMG for squinting and blink rate, as well as symptoms, were all measured.
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