People say that the eyes are the windows of the soul, but if this window is not on the glass, do not install a window, then it can not block the attack of ultraviolet rays, causing parts of the room to be sun-damaged. President Zhou Hongjian told reporters that the eyes are the same, if not properly protected from the sun, it will lead to damage to the internal structure, degeneration, causing a variety of acute and chronic eye diseases, such as pterygium, cataract, retinal degeneration, solar keratitis. Pterygium A pterygium is an abnormal growth of the conjunctiva of the eye, named for its shape resembling an insect wing. Studies have shown that the onset of pterygium is related to ultraviolet radiation, with a higher incidence in people near the earth’s equator and those who work outdoors (e.g., fishermen, farmers, etc.); while the higher the latitude, the lower the incidence. Cataract Long-term chronic ultraviolet radiation is considered an important cause of age-related cataract formation. Dr. Zhou said that the lens is the most important eye “defense wall”, filtered about 95% of the ultraviolet light, ultraviolet radiation on the lens is the impact of long-term, chronic accumulation of oxidative damage process. Although the defense system present in the transparent lens is sufficiently protective, when the accumulated effect exceeds a critical level, irreversible damage occurs. The effect of UV radiation on the lens is mainly a photochemical damage effect, which causes abnormal metabolism of the redox system of the lens, thus triggering cataract formation. The high incidence of cataracts in highland areas is closely related to UV overexposure at a younger age. Macular degeneration Age-related macular degeneration is a common blinding eye disease among the elderly in China, which can cause irreversible visual impairment and for which there is no effective prevention and treatment method worldwide. Its etiology is still unclear, but a large number of studies have shown that chronic light damage plays an important role. Long-term exposure to ultraviolet light causes damage to the retinal pigment epithelium and photoreceptor cells, which can lead to retinal degeneration. The macula, a 2-3 mm area in the center of the retina, is the place where vision is most acute, and if affected, will lead to irreversible vision loss. Epidemiologic surveys have shown that the incidence of age-related macular degeneration decreases in those who wear sunglasses regularly. Therefore, the prevention of various eye diseases caused by ultraviolet radiation is still mainly based on protection. Wearing sunglasses when going out and myopic patients wearing myopic glasses can block most of the ultraviolet rays. But only glasses are not enough, the side of the ultraviolet light can still be irradiated from the edge of the frame to the inner corner of the eye, especially prone to cause pterygium, so wear a wide-brimmed hat or umbrella protection, is the appropriate supplement to the glasses of the lack of sunscreen points. In addition, the use of some antioxidant drugs for ultraviolet radiation caused by oxidation of various parts of the eye has a certain therapeutic effect, commonly used beta-carotene, vitamin E, etc.; daily dietary intake of food rich in such nutrients, the eyes are also beneficial.