Abstract
The comparison between complaints, functional defects and vitamin deficiencies is reported for several professional groups characterized by different work conditions. Results suggest that complaints are an useful indicator of visual load and that retinal sensitivity to the light is especially tried. Longitudinal studies are required to verify whether some functional alterations on the aging process of the eye can be aggravated by a visual overload. Visual complaints, functional defects and vitamin deficiencies as indicators of visual load.
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