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司徒辉先生: 来信问及VDT(视屏显示终端)作业环境对人体健康有什么影响。现答复如下。随着电脑在各行各业的应用日益普及,人们接触VDT的机会也与日俱增,VDT作业人员的职业危害问题也逐渐暴露,引起国内外学者的关注。据国内科研人员对此问题的调查研究,认为VDT作业的主要职业危害有下面几个方面。①VDT作业者的眼睛从荧屏、文件、键盘间移动频繁,加上两眼在各视点间亮度及视距的频繁变化中过度调节,给眼睛造成极大的负担,从而引起眼睛不适及眼睛疲劳症状,表现为眼痛、眼胀、流泪、眼痒、视物模糊、复视等,甚至出现暂时近视和继发性头痛。调查表明,VDT作业组的视觉疲劳出现率(62.5％)高于对照组(22.73％)。
Mr. Szeto Foo: Letters asked about VDT (video display terminal) operating environment on human health have any effect. The reply is as follows. With the increasing popularity of computers in all walks of life, people are also increasingly exposed to VDT opportunities, and occupational hazards of VDT operators are gradually exposed, attracting the attention of scholars at home and abroad. According to the domestic researchers on the issue of investigation and study, that the major occupational hazards of VDT operations in the following areas. ①VDT operator’s eyes from the screen, files, move frequently between the keyboard, together with the two eyes in the brightness between the various points of view and frequent changes in the over-regulation, to the eye a great burden, causing eye irritation and eye fatigue symptoms , Manifested as eye pain, eye swelling, tearing, itchy eyes, blurred vision, diplopia, etc., and even temporary myopia and secondary headache. The survey showed that visual fatigue rate (62.5%) in VDT group was higher than that in control group (22.73%).