The effect of dried skipjack soup stock on visual fatigue

Abstract

The effects of dried skipjack soup stock on 11 healthy adults, who were engaged in VDT work, were investigated by a single open study in which the stock was given orally for 4 weeks. The critical fusion frequency (CFF) and subjective symptoms were investigated in 11 workers working with computers over 4 hours daily, 5 days weekly. Improvements were obtained in CFF and subjective symptoms at Week 4. A questionnaire-based assessment showed that intake of dried skipjack soup stock improved the subjective symptoms of visual fatigue that developed after the task. The CFF after the intake of dried skipjack soup stock was significantly lower than before intake. The effect of dried skipjack soup stock was influenced by the initial state of the flicker frequency. The findings of this study raise the possibility that CFF and subjective symptoms improve after the intake of dried skipjack soup stock in VDT workers.