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调整电脑屏幕———屏幕扫描频率应大于每秒６０次，如果扫描频率太慢将会造成屏幕闪烁，进一步造成眼睛不适。可以把头偏向一侧，用眼睛余光看着屏幕，调整屏幕的对比度和明亮度，直到没有闪烁为止。调整眼睛位置———一般人正常的阅读角度约为俯角４０°。直视电脑屏幕是一
Adjust the computer screen --- screen scanning frequency should be greater than 60 times per second, if the scan frequency is too slow will cause the screen flashes, further cause eye discomfort. You can tilt your head to one side, looking at the screen with the extra light of your eyes, adjusting the contrast and brightness of the screen until there is no blinking. Adjust the eye position --- most people read the normal angle of depression of about 40 °. Looking at the computer screen is one