How to choose sunglasses, how to choose sunglasses that suit you? _Sunglasses knowledge_

Due to its powerful functions, sunglasses are becoming more and more popular among the public. There are various fashion avant-garde or retro nostalgic models on the market. I visited many regular glasses stores to answer how to choose the right sunglasses. 1. Don't worry too much about the price, the official trademark is the king. At present, the glasses market is still in the stage of lack of supervision. Many unscrupulous merchants sell the miscellaneous glasses driven by their interests without the support of the official trademark manufacturers. The price gap is always difficult. Control the temptation, so that it often appears that the light is more dazzling after wearing sunglasses. Obviously, there is no quality guarantee for this kind of sunglasses, not to mention the after-sales service. Some cheap sunglasses are made of ordinary glass lenses to impersonate or directly recycle old lenses for secondary use. All glasses must not care too much about the price, and only qualified stores can ensure the perfect quality. 2. There is no relationship between UV protection and lens color. Many customers think that the darker the lens color, the better the UV protection effect. In fact, this is a common misunderstanding. In fact, the depth of the lens color only affects the absorption of visible light by the lens, and has nothing to do with the ability to resist UV rays. The lens material is the key to affecting the UV resistance of the lens. Generally, the lenses of sunglasses with anti-ultraviolet function are coated with a special anti-ultraviolet coating, and the quality of this coating directly affects the effect of anti-ultraviolet. 3. Choose according to your own needs. When choosing the color of sunglasses or polarized lenses, the first thing to consider is the light factor. If the wearer often needs to be in strong light, it will be more suitable to choose sunglasses with darker lenses. Personal preference and excessive pursuit of dark colors, because wearing too dark lenses will cause damage to the eyes. Under normal circumstances, the color of sunglasses should be medium depth, and the lens color is brown and gray, which is beneficial to the eyes, because they are neutral colors and do not change the primary color of the object. Secondly, the UV-resistant sunglasses will be marked with U-VA and UVB logos on the label. Products without this logo do not have UV protection!