UV value is not the only standard to judge the sunglasses

Now the weather is becoming more and more hot, hot day, the sun is dazzling, a lot of people would wear sunglasses when you go out, but can buy sunglasses on the market, price difference is too big, cheap a few dollars, ten dollars, you have thousands of yuan. Exactly what kind of sunglasses uv protection effect is good? Ray-ban sunglasses RB4125F men 901 black roadside stall sunglasses can prevent ultraviolet radiation? In the face of sunglasses in a wide range of designs, how should we choose? Everyone has their own points of view. Some people like more fashion, someone wants to wear comfortable. Many people value when the choose and buy sunglasses is the appearance of the glasses and affordable price, the quality of these stalls of cheap sunglasses can pass a barrier? If you don't pass, the damage to the eyes have how old? 20 dollars can buy a pair of sunglasses, that this kind of sunglasses to prevent bask in effect how? Glasses mark uv400 mean uv index, general uv index to reach 385 can effectively prevent ultraviolet light. Now many people are buying sunglasses, focused on the sunglasses uv value, thought that the uv values as long as standard can prevent ultraviolet light hurt my eyes, in fact, uv value standard of some sunglasses, eye damage is not small. 6201/13 brown sunglasses, ray-ban RB4242 unisex eyeglass frame selection error: UV value standard is not equal to protect eyes UV 400 is not the only standard of judgment of sunglasses worn, but in the work process of sunglasses and comfort, light transmittance, is also essential. See light transmittance is not a good way to also is very simple, as long as five minutes to ten minutes with glasses eyes not tired not blurred, light transmittance even if they could. This, along with the quality of the lens and film layer on the surface of the has a lot to do. Most sell radiation-proof sunglasses are on the market do not have this effect, because the radiation protection sunglasses price is expensive, is plated on the lens of a radiation protection film layer, a more affordable won't have this effect. In addition, a lot of people think generally, sunglasses only sunny day in the summer, the sun is dazzling, to need to wear, it is also wrong. Ray-ban RB3016 - M men sunglasses 1182/4 e wood sunglasses not only wear in the summer, when it's cloudy ultraviolet intensity may be stronger than a sunny day, so whether in winter or summer, if the sun can wear sunglasses. Sunglasses choice was simple: qualified and appropriate understanding after so much misunderstanding, how to choose a good quality, and is suitable for your sunglasses? The choose and buy sunglasses first to see if there are any qualified production pass, then have a look at this one isn't suitable for their own face, look at the quality of the sunglasses and light transmittance of the lens is ok. Small sunglasses, there is so much of the knowledge, is in big guy don't forget to consider when choosing just small make up advice, don't maltreat his own eyes.
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