Basic knowledge of sunglasses: uv damage to the choroid and retina
Sunglasses in addition to can reduce the radiation intensity of visible light, can also reduce the ultraviolet and infrared radiation. Sunglasses cash more endowed with fashionable breath. But the fundamental role of sunglasses is to provide radiation protection for the eyes. Sunglasses are introduced in this paper the basic knowledge of uv damage to the choroid and retina. To travel to the surface of the ultraviolet radiation is restricted by many factors, such as season, latitude, altitude, climate, sunshine time, the surrounding environment on the reflectivity of ultraviolet (uv) radiation, etc. With the solar zenith Angle, ozone concentration, cloud, surface reflectivity is important. Surface ultraviolet radiation of ultraviolet radiation that is not the same as the lens. Human activities such as personal habits, length of time of outdoor activities and professional on eye ultraviolet (uv) radiation is obvious, the influence of other factors can also affect the eye ultraviolet radiation. The degree of tissue damage a dose-dependent relationship, that is, the longer the irradiation time, the greater the dose, the more serious the cause of damage. Ultraviolet radiation causes the damage of the eye including cornea, conjunctiva, turn film, lens, related epithelial injury. Ultraviolet (uv) radiation of choroid and retinal damage: the onset of eye choroid melanoma associated with ultraviolet (uv) radiation. Its dangerous for covered include: blue eyes, Scattering of the shortwave radiation more influence to reach the fundus) , living in low latitudes, sunbathing, using fluorescent lamp, often go to the beach, long live in plateau snow area, rarely wear sunbonnet instruments or related eye protector, etc. Solar sex macular degeneration caused by eyes directly at the sun. Most of these patients will not fail, half of the people in a few months later to restore the original vision. Scotopic vision change due to stay too long in the light, more dark visual impact, this may be related to retinal rod cell damage. Age-related macular degeneration is much related to the light of the ocular injury, and the epidemiological studies have found that the relationship between age-related macular degeneration and blu-ray are closer than ultraviolet light. Next we introduce basic knowledge of sunglasses of visible damage to the human eye.