Sunglasses are a kind of glasses that can be used not only to play cool, but also to make use of its opacity so that you can look directly at everything from the surface. At the same time it is a kind of glasses that can block the sun's rays. Sunglasses are also called sunglasses. It is a "labor" product that protects the eyes under strong light. Wearing this kind of lens can block ultraviolet rays and infrared rays, and the color of the external environment does not change. Only the light intensity changes, like a cloudy sky, it has a cool and comfortable feeling.
Strong sunlight contains a lot of ultraviolet and infrared rays, which may damage the cornea, lens, and even the fundus of the eye. Wearing a pair of sunglasses can block or absorb a part of the light and reduce the irritation to the eyes. In recent years, due to the importance attached to health, many people like to wear sunglasses when they go out in the hot summer to reduce the stimulation of the sun. Some people like to use it as a decoration. There are many kinds of sunglasses, which should be different according to different Need to choose.