How to choose sunglasses in summer?

u003cbru003eSunglasses are definitely a styling tool for fashion darlings in the hot summer. But how do we choose the right sunglasses? Do you really need sunglasses? How important is the color of the lens? What is the size of the lenses and frames, etc., there is still a lot of knowledge. Recommended reading: What are the benefits of wearing polarized sunglasses often? 1. How to choose a good lens? Sunglasses are divided into light absorption, polarized light, coating and photochromic. The best lenses are polished using an optical procedure, just like glasses formulated by a doctor. Plastic lenses, like glass, have very different qualities. Generally, plastic is relatively light, not broken, and inexpensive; it can be easily scratched, so be careful when you touch the lens or decontaminate. There are a few simple ways to inspect the lens: look at the light under the light, the lens should be completely clear, without any cross scratches, streak circles, bubbles, and stains. Move the lens up, down, left, and right to observe objects with clear lines, such as window frames and door frames. If they shake or deform, the lens is distorted. This kind of lens cannot be used. Check whether the color of the lens is uniform, you can pay attention to see that the colors of the two lenses are the same and different, and whether it is gradually becoming lighter. 2. The price of lens color sunglasses does not completely represent the quality of the optical quality, because the most expensive may be a novel design. The price you pay may be the fashionable frame, not the optical quality of the lens. What color is the best? Generally, natural pure gray and 'smoke' color are the best. Lenses of this color are the most difficult to manufacture, so inferior glasses will not use this color. The second is green. Blue and red lenses are only used in certain industrial applications. The special lens is also yellow. Therefore, the color of the lens depends on the purpose. How dark should Gu Se? The darkest color is suitable for use under strong light. If it is used to drive on a road with varying brightness, it is very dangerous. Many people buy spectacle lenses that are suitable for brightly lit shops, and they appear too shallow to get to the beach or outskirts. . The best way is to take the glasses to the street and look at the sun. Under strong light, only two to three percent of the light can pass through.
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