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本文采用颜氏随机点《立体视觉检查图》,随机调查了537名铁路机务人员的立体视觉情况。其中达到正常立体视锐度阈值≤60秒角者共484名,占全部受检者的90％。立体视觉不良者46名,完全无立体视觉者8名。从而证实了人群中确有少数人患有立体盲或立体弱,故我们认为应把立体视觉检查作为铁路机务人员的体检项目之一。同时,在调查中还发现随着年龄的增加,立体视觉响应速度有所下降,年龄在40岁以上者立体图识别时间较40岁以下者明显延长。故提示人类立体视觉的敏锐性可能随着年龄的增加而有所下降。
In this paper, Yan random point “stereoscopic visual inspection map”, a random survey of 537 railway crew stereo vision. In which the normal stereopsis threshold of 60 seconds or less, a total of 484, accounting for 90% of all subjects. 46 stereoscopic vision problems, there is no stereoscopic vision 8. Thus confirming that there are indeed a small number of people in the population suffering from stereopsis or weakness. Therefore, we think that stereoscopic examination should be taken as one of the medical examination items for railway maintenance personnel. At the same time, the survey also found that with the increase of age, stereoscopic visual response rate has decreased, more than 40 years of age stereoscopic image recognition time was significantly longer than 40 years of age. It suggests that the sensitivity of human stereoscopic vision may decline with age.