Sunglasses are also called sun visors. Summer and highland areas, people often wear sunglasses, from strong light stimulation, blocking the damage to the eyes of ultraviolet light. With the improvement of living standards, people are more cherish their own eyes. In the sun, the UV damage to the eyes. The amount of ultraviolet light in the sun’s rays reaching the Earth’s surface is about 7%. The cornea and crystals of the human eye are eye tissues that are susceptible to UV damage. Cataracts are associated with ultraviolet rays for close eye diseases, solar keratitis, corneal endothelium injury, eyeball macular discoloration, retinitis and other ophthalmic diseases are related to ultraviolet light. Qualified Wayfarer Sunglasses have the ability to intercept ultraviolet and infrared. It can be said that summer wear sunglasses is one of the effective means to protect the eyes from UV damage.
ray ban rb2132 Sunglasses are generally divided into light and dark two categories, composed of a variety of colors. Judge the quality of sunglasses, focusing on the assessment of vertex and prism degree, transmission ratio characteristics, surface quality and intrinsic flaws, assembly accuracy and plastic requirements of several technical indicators.
A good quality ray ban rb2132 Sunglasses can play a shade and decorative appearance of the role. But in the market, the actual situation is not optimistic. Some traders see the righteousness, drilling consumers understand the quality of sunglasses is not much loopholes, the use of poor quality materials, low prices of windows glass or other low-quality materials produced glasses. These materials are poor uniformity, including stripes, bubbles and other impurities, can not block the UV, does not meet the physiological requirements of the human eye. What is more, the use of visible light transmittance is very low, but the UV transmittance is very high quality plastic film making sunglasses, causing harm to consumers.
How to pick and wear sunglasses? Experts remind consumers, do not just pay attention to sunglasses style, but also pay attention to its inherent quality. Qualified sunglasses, wavelengths between 315nm and 380nm long-wave ultraviolet transmittance of not more than 10%, wavelength of 280nm to 315nm in the UV transmittance should be zero. Wear this sunglasses in order to make the cornea of the eyes, crystals and retina from UV damage. Some cheap sunglasses can not only filter out ultraviolet light, but will be blocked by the visible light, so that the ultraviolet radiation is more significant, such inferior sunglasses as if not wear.
ray ban rb2132 Sunglasses are flat mirror series. In accordance with national standards, sunglasses and more allowed only with plus or minus 8 degrees of refraction, more than this error range is substandard products. According to scientific research personnel on the market sunglasses detection, nearly 30% of the sunglasses diopter over tolerance, and some even up to 20 degrees. Experts point out that the normal vision of consumers wear this replica ray ban rb2132, as wearing a pair of myopia or binoculars, a summer later, consumers will be inferior sunglasses “training” into myopia or hyperopia patients. When you wear sunglasses after dizziness, nausea, dazzling and other symptoms, should immediately stop wearing.
Experts pointed out that not all fake ray ban rb2132 can be used as a driver with a mirror. Many sunglasses on the market do not have the ability to identify different colors of traffic lights.