随着信息时代的到来，电脑从业人员的人数越来越多，众所周知，电脑操作者在萤光屏前工作时间过长，视网膜上的视紫红质会被消耗掉，这样容易造成视力疲劳甚至视力下降。而视紫红质主要由维生素Ａ合成。因此适当补充维生素Ａ对预防视力减弱有一定效果。 在胡萝卜、白菜、豆芽、 With the advent of the information age, there are more and more computer practitioners. As we all know, computer operators work too long before the fluorescent screen and the rhodopsin on the retina will be consumed, which may easily lead to visual fatigue or even vision decline. Rhodopsin is mainly synthesized by vitamin A. Therefore, appropriate vitamin A to prevent vision loss have a certain effect. In carrots, cabbage, bean sprouts,