Why we need to wear sunglasses?
Ophthalmologists suggest that sunglasses must be worn frequently to protect the eyes; this is because our eyeballs (lens) are very easy to absorb ultraviolet rays, and the damage of ultraviolet rays has two outstanding characteristics:
1. UV damage will accumulate. Because ultraviolet light is invisible light, it is difficult for people to feel it intuitively.
2. The damage of ultraviolet rays to eyes is irreversible, that is, irreparable. For example, cataract surgery can only be replaced by intraocular lenses. Long-term damage to the eye can easily lead to damage to the cornea and retina, opacity of the lens and cataracts, 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 usually wear glasses, you don’t feel particularly uncomfortable. It just means that your eyes are not very sensitive to visible light (such as glare, glare, and reflected light). , And can not avoid the damage of ultraviolet rays.