连续视觉显示终端作业过程中视疲劳指标变化规律的研究

Study on Changes of Visual Fatigue Index during Prolonged Visual Display Terminal Operation.

在阴极射线管（ＣＲＴ）显示器屏幕上按四种方式（固定、滚动、变动、混合）显示排列成一行的２５个白色阿拉伯数字，每行由０～９十个数字中的９个组成，要求被试者找出所缺的１个数字。８位被试参加４次实验，每次只接受一种方式的作业，连续３ｈ。对实验前和连续工作３０、６０、８０、１００、１２０、１５０和１８０ｍｉｎ以及休息５、１０和１５ｍｉｎ时的纵向动态视力进行测试。结果表明，在四种显示方式中，随着工作时间的延长，纵向动态视力不断下降，且先快后慢，其恢复也是先快后慢。

Arabic numerals (0～9) lined in a row were displayed with 4 different patterns on CRT.The subjects were asked to find out the one missed numeral in the row and to press the key corresponding to the numeral.The work lasted for 3h.Longitudino-Kinetic visual acuity was measured before and at 30、60、80、100、120、150、180 minute during the work.The results showed that the Longitudino- kinetic visual acuity droped with working time and recovered after work quickly at first and then slowly.