Eight things to pay attention to when buying sunglasses


Inferior sunglasses have unclear vision and cannot withstand ultraviolet rays. As a result, the pupils are enlarged and the lenses of the two eyes can absorb more ultraviolet rays. Therefore, you must choose a store with a good promise. So what should you pay attention to when buying sunglasses? First, first observe whether the lenses have scratches, impurities, bubbles, or stripes. Check the outer packaging of the sunglasses. Standard sunglasses should be marked with the name, color, diameter, quality level, and manufacturer. Name and trademark. Second, the mirror or tag has the anti-UVA, UVB and CE marks. When buying sunglasses, try to see if you feel fainting or headache. Nowadays, there are some prescription sunglasses for myopia on the market, but because the interpupillary distance and other indicators vary from person to person, consumers should not choose this kind of prescription sunglasses without professional guidance. Third, hold the two corners of the sunglasses against the fluorescent lamp, and make the reflective strip of the mirror roll steeply. If you find that the fluorescent lamp shadow reflected by the mirror is wavy or distorted, it proves that the lens is not flat. Fourth, the lens should be flat and the transparency should be high. The raw materials of the sunglasses are glass and resin, and the best sunglasses should be polarized lenses. It is made of the same lightweight and fine synthetic resin as the contact lens. It is composed of seven layers of thin sheets. The outer two layers are super hard wear-resistant layers; the second and sixth layers are anti-shatter strengthened layers; the third and fifth layers are ultraviolet filters. The center layer is the polarizing filter layer. Polarized lenses can effectively filter out reflected light and harmful ultraviolet rays, and have the functions of anti-shatter and anti-wear, which are popular sunglasses. Fifth, the color of sunglasses should not only be adjusted according to one's skin color, face shape, and wear, but also according to the place of entry and exit. Generally speaking, black, brown, and gray have good filtering effects; gray lenses can absorb any color spectrum in a balanced manner, and the scene seen after wearing the glasses will only darken without obvious chromatic aberration; brown lenses can filter out a lot Blue light can improve visual contrast and clarity, and is particularly effective when worn under severe air pollution or foggy conditions. Sixth, what color shade of sunglasses suits us? A simple self-test method is to wear sunglasses in front of the mirror, with the limit of being able to see one's own pupil. If the color is too light, the filtering effect is too small; if the color is too dark, the vision will be affected and the color perception will be weakened. The colorful light-colored sunglasses that are popular this year should not be used for beach water activities, in highly reflective snow and under the sun with very strong sunlight. Instead, wear sports sunglasses. Most of them use colorful, saturated colors that can absorb or Reflects more visible light. Seventh, in addition to reducing the irritation of strong light and making the eyes comfortable, the main purpose of wearing sunglasses is to prevent ultraviolet rays from damaging the eyes. The color of the lens and whether it is UV-resistant are two different things. So be sure to choose lenses that are marked with UV protection. Usually the UV index of sunglasses is between 96%-98%. Eighth, in general, spectacle shops will have equipment that can detect the size of sunglasses against ultraviolet rays. After this test, you can know whether the glasses in your hand are helpful to your eye health. What color is good for sunglasses? In the selection of lens color, from the perspective of blocking light, gray and brown sunglasses should be selected as much as possible. Compared with other colors, lenses of this color can effectively maintain the color of the object itself. And can filter harmful substances from ultraviolet rays. Some other children wear sunglasses indoors and outdoors for 'playing cool'. This is not advisable. You can wear sunglasses for eye protection outdoors, but you should take off sunglasses when indoors. Because the indoor light is dark, wearing dark sunglasses will cause long-term fatigue of your eyes, serious eye muscles, and blurred vision. Related Reading: Sunglasses Polarized Sunglasses
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