wearing this kind of lens can block ultraviolet and infrared rays.
wearing a pair of sunglasses can block or absorb part of the light and reduce the irritation to the eyes. in recent years, due to the importance of health, many people like to wear sunglasses when going out in the summer to reduce the stimulation of the sun. at the same time, the color of the external environment does not change, only the light intensity changes, as if it i strong sunlight contains a lot of ultraviolet and infrared rays, which may damage the cornea, lens, and even the fundus of the eyes. some people also like to use them as decorations.