Eyestrain, Blink Rate and Dry Eye Syndromes of Video Display Terminal Users

摘要

We investigated whether the eyestrain, often experienced by subjects using a video display terminal (VDT) for an extended period of time, is due to the decrease of blink rate or to the temporarily dry eyes. Thirty-seven subjects with no dry eyes but experienced eyestrain participated in a series of experiments. The 1st experiment was performed without using VDT to obtain the control data and subsequent experiments were performed with a VDT. In those experiments we established the base line for the eyestrain, increased the blink rate and supplied the eyes with eyedrops. Blink rate, visual acuity, temporal modulation transfer function and degree of severity of eyestrain were recorded before and after each experiment. The obtained results suggested that, using the VDT causes the decrease of the blink rate that in turn produces dry eyes which causes the eyestrain.