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Effects of Polyphenol on Visual Fatigue Caused by VDT Work

Yoshihara A., Yamanaka K., Kawakami M.

International Journal of Occupational Safety and Ergonomics

2009

Vol. 15, No. 3

339--343

Visual fatigue of VDT (visual display terminal) operators poses a serious problem for corporations where VDT work is a major part of operations. In this study, an investigation in a corporation was carried out to examine the effect of polyphenol on recovery from visual fatigue of the visual function caused by working at a VDT. Three kinds of parameters were used for evaluating the effect of polyphenol. As a subjective evaluation, the first was a questionnaire to ascertain subjective feelings of fatigue. As aspects of a physiological evaluation, the second and third parameters were the accommodative function and the flicker value.