Do your sunglasses really work?

We have recommended many types of sunglasses to you before, and also introduced the method of identifying polarized sunglasses, but there are still many people who say that the sunglasses they choose do not seem to block ultraviolet rays, and the protection effect on the eyes is also very small, yes What's wrong with not sunglasses? Are the sunglasses you bought really useful? With these questions, let's take a look at the knowledge of sunglasses that conchen has organized for you, hoping to help you buy sunglasses that suit you.

1. observe whether the lens has scratches, impurities, bubbles, stripes, and check the outer packaging of the sunglasses. Regular sunglasses should be marked with the product name, color, diameter, quality level, manufacturer's name and trademark. UVA, UVB and CE marked sunglasses are guaranteed to block certain UV rays.

2. Wear it and try to see if you feel dizzy or headache. Now there are some myopic sunglasses on the market that are marked with degrees. For ordinary consumers, it is best not to choose such sunglasses with degrees.

3. Hold the two corners of the sunglasses by hand to the fluorescent lamp, and let the reflective strips of the mirror roll smoothly. If you find that the fluorescent lamp shadow reflected by the mirror appears wavy and twisted, it proves that the lens is not flat, and such a mirror will damage your eyesight.

4. the lens should be flat, the transparency should be high, the sun lens material is glass and resin, and the best sun lens should be polarized lens.

5. The color of sunglasses should not only be matched according to your skin color, face shape, and clothing, but also should be selected according to the place of entry and exit. Generally speaking, the filtering effect of black, brown and gray is good; the gray lens can absorb any color spectrum evenly, and the scene seen after wearing it will only become darker without obvious chromatic aberration; the brown lens can filter out a lot of Blue light, which improves visual contrast and clarity, especially when worn in heavily polluted or foggy conditions.

6. In addition to reducing the stimulation of strong light and making the eyes comfortable, the main purpose of wearing sunglasses is to prevent ultraviolet rays from causing damage to the eyes, and the color of the lenses and whether they are UV protected are two different things. Even if the lenses are dark, they may not be able to effectively prevent UV. Be sure to choose lenses marked with UV protection. Usually the UV index of sunglasses is between 96% and 98%.

7. Generally, regular optical shops will have instruments to detect the ability of sunglasses to resist ultraviolet rays. Through this test, you can know whether the glasses in your hands are helpful to eye health.

Sunglasses play a great role in protecting our eyes, and unqualified sunglasses on the market will only waste our money and have little meaning for us to protect our eyes. Therefore, only by choosing useful and correct sunglasses can we keep us in the hot sun. Have a good trip, if you don't have sunglasses yet, why don't you come to conchen to buy a pair of regular sunglasses!