Let's find out how to use sunglasses, which have become a summer survival necessity, for a long time. pexelsStrong ultraviolet rays affect not only the skin but also the eyes. Prolonged exposure to ultraviolet rays can increase the risk of cataracts, photokeratitis, macular degeneration, etc., so wearing sunglasses in the summer is considered an important habit for eye health. However, even if you buy expensive sunglasses, if you do not know how to care for them incorrectly, fine scratches may occur on the lenses and the coating may become damaged.