Why we have to wear sunglasses

1. (sunglasses)UV damage will accumulate. Because ultraviolet light is invisible light, it is difficult for people to feel it intuitively.

2.(sunglasses) UV damage to the eyes is irreversible, that is, irreparable. For example, cataract surgery can only be replaced by intraocular lens. If the eyes are invaded for a long time, it is easy to cause damage to cornea and retina, lens opacity and even cataract, resulting in permanent visual damage.

Because the damage of ultraviolet rays to the eyes is invisible, it can not be felt immediately. If you don't wear glasses at ordinary times, you don't feel particularly uncomfortable. It just shows that your eyes are not very sensitive to visible light (such as sharp light, glare and reflected light), and can't avoid the damage of ultraviolet rays.(sunglasses)