Are Your Sunglasses Really Useful?
1、 Firstly, observe whether there are scratches, impurities, bubbles, and stripes on the lenses, and check the outer packaging of the sunglasses. Regular sunglasses should be labeled with the product name, color, diameter, quality level, manufacturer name, and trademark. Sunglasses with UVA, UVB, and CE markings on the mirror or tag can ensure a certain degree of UV protection.
2、 Try wearing it to see if you feel dizzy or have a headache. There are some nearsighted sunglasses with prescription on the market now, and for ordinary consumers, it is best not to choose these sunglasses with prescription.
3、 Hold the two corners of the sunglasses with your hands towards the fluorescent lamp, and let the reflective strip of the mirror surface roll smoothly. If you find that the shadow of the fluorescent lamp reflected by the mirror surface appears wavy or twisted, it proves that the lens is not flat, and such a mirror surface will damage vision.
4、 The lens should be flat and have high transparency. The materials of solar lenses include glass and resin, and the best solar lenses should use polarized lenses.
5、 The color of sunglasses should not only be matched according to one's skin tone, face shape, and clothing, but also chosen according to the place of entry and exit. Generally speaking, black, brown, and gray have good filtering effects; Gray lenses can evenly absorb any color spectrum, and the scenery seen after wearing them will only darken without significant color difference; Tea colored lenses can filter out a large amount of blue light, improve visual contrast and clarity, and are particularly effective when worn in severe air pollution or foggy conditions.
6、 The main purpose of wearing sunglasses is not only to reduce strong light stimulation and make the eyes comfortable, but also to prevent UV damage to the eyes. The color of the lens and whether it is UV resistant are two different things. Even if the lens color is dark, it may not effectively prevent UV, so it is necessary to choose lenses labeled with UV protection function. The UV index of sunglasses is usually between 96% and 98%.
7、 Regular eyewear stores usually have instruments to test the UV resistance of sunglasses. Through this test, it can be determined whether the glasses in hand are helpful for eye health.
Sunglasses play a significant role in protecting our eyes, and substandard sunglasses on the market only waste our money and have little significance in protecting our eyes. Therefore, only by choosing useful and correct sunglasses can we travel happily under the scorching sun
