视觉作业效率与视觉功能时间变化特性的研究

A Study on Temporal Character of Visual Function and Working Efficiency.

为探讨视觉作业过程中作业效率与视形觉功能的变化特性，分别测试２０名健康男性青年完成６０ｍｉｎ和１２０ｍｉｎ目标辨认任务的作业效率，并检测作业前、６０ｍｉｎ和１２０ｍｉｎ作业后的视形觉功能。结果表明：①完成６０ｍｉｎ和１２０ｍｉｎ作业的正确率均达９０％以上，且无统计学差异（Ｐ＝０．６７６）；但两次作业的反应时（ＲＴ）之差达１１８ｍｓ，相差极为显著（Ｐ＜０．００１）。②６０ｍｉｎ和１２０ｍｉｎ作业后，视形觉功能较作业前均有下降。提示随作业时间延长，视觉功能随之降低，并导致中枢信息处理能力即作业效率下降。

To investigate the temporal response character of visual function and working efficiency,20 subjects were examined with a series of vision tests(before and 60 min or 120min after working) and working efficiency in identifying meaningless images for 60 min and 120min.It was found that after 60 min or 120min working,visual functions were significantly lower than before working (P<0.05 or P<0.01).The working efficiency was significantly lower after 120min than after 60min.It is suggested that visual function were decreased in the course of working and prolonged.