Improper lighting and glare are another problem. Contrast is critical, best achieved with black writing on a white screen. The screen should be brighter than the ambient light — overly bright overhead light and streaming daylight force the eyes to strain to see what is on the screen. A bright monitor also causes your pupils to constrict, giving the eyes a greater range of focus.
不恰当的照明和炫光也会成为问题。对比很关键,白色屏幕与黑色字迹的对比最为强烈。显示器应该比环境光亮一些——过亮的顶灯或者强烈的阳光,会迫使眼睛非常用力地望向屏幕。明亮的显示器还会让瞳孔收缩,从而让眼睛的聚焦范围更大。
You might need to reposition the desk, use a dimmer switch on overhead lights, or lower window shades to keep out sunlight. In addition, using a flat screen with an antiglare cover, and wearing glare-reducing or tinted lenses can help to minimize glare.
你或许需要调整桌子的位置,给顶灯安装调光开关,或者拉下遮光窗帘,把阳光挡在外边。此外,使用贴有防眩光膜的平面屏幕,佩戴防眩光或有色眼镜,也有利于最大程度地减少炫光。
Be sure to use a font size best suited to your visual acuity, and have your eyes examined regularly — at least once a year — to be sure your prescription is up-to-date. This is especially important for people older than 40 and for children who are heavy users of computers because visual acuity can change with age. Make sure, too, that your monitor has a high-resolution display that provides sharper type and crisper images. And clean the monitor often with an antistatic dust cloth.
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