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随着电子计算机的普及,视屏显示终端(VDT)广泛应用于生产、科研、行政管理、信息处理等领域。它极大地提高了工作效率,但也带来了诸多新的职业危害问题:1.视觉紧张。一方面受荧光屏本身的闪烁光和反射光的作用;另一方面由于时而注视荧屏,时而注视资料、单据等(如信息处理操作),受两处亮度差异的影响,要求眼肌和瞳孔频繁进行调节,易致视疲劳并有眼充血、流泪、酸、胀、痛和视觉模糊,有的出现暂时性近视与继发性头痛等症状。少数人在持续注视绿色荧屏后,会把荧屏上的白色水平线条感觉为淡红色,持续可达一周之久。
With the popularity of electronic computers, video display terminals (VDT) are widely used in production, research, administration, information processing and other fields. It has greatly improved work efficiency, but also brought many new occupational hazards: 1. Visual tension. On the one hand by the screen itself flashes of light and reflected light effect; the other hand, as time to watch the screen, sometimes watching data, documents and so on (such as information processing operations), subject to two brightness differences, require frequent oculomotor and pupil Regulation, easy to cause fatigue and eye congestion, tearing, acid, swelling, pain and blurred vision, and some temporary myopia and secondary headache and other symptoms. A small number of people continue to watch the green screen, the screen will be white horizontal lines feel red, up to a week long.