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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。
In order to explore the characteristics of homework efficiency and visual function during visual operation, 20 healthy male males were tested for the task efficiency in 60min and 120min respectively, and the visual function after operation of 60min and 120min . The results showed that: (1) The correct rates of operation at 60min and 120min reached over 90% with no significant difference (P = 0.676); however, the difference of RT between two operations was 118ms, the difference was significant P <0.001). ②60min and 120min after operation, visual function than before work have decreased. Tip With the extension of operation time, visual function will be reduced, and lead to the central information processing capacity that is operating efficiency decline.