Things you don't know about sunglasses

u003cbru003eYou wear glasses.com/sunglasses-1.html' target='_blank'>sunglasses every day, looking at a fashionable and professional look. In fact, you may be an 'illiterate' sunglasses. Why do you say that, because you may not even understand the basic common sense of sunglasses. If you don't believe you, you will look down. Look, look at those sunglasses that you don’t know about. 1. Sunglasses can be 100% UV-resistant? Many people think that as long as sunglasses are 100% UV-resistant, this idea is wrong. Not to mention inferior sunglasses, high-quality sunglasses can basically completely eliminate UV radiation. Sunglasses with anti-ultraviolet function generally have several explicit ways: 1. Mark 'UV400': it means that the isolation wavelength of the lens to ultraviolet rays is 400nm, that is, the maximum value of its spectral transmittance at a wavelength below 400nm cannot be greater than 2%. 2. Mark 'UV' and 'UV protection': it means that the cut-off wavelength of the lens to ultraviolet light is 380nm. 3. Mark '100% UV absorption': it means that the lens has 100% absorption of ultraviolet rays, which means that the average transmittance in the ultraviolet range is not more than 0.5%. Generally, only those with the above-mentioned marks can be regarded as sunglasses with a real protection function against ultraviolet rays. YC9702 General Sunglasses C1 black frame, white legs/colorful silver lens 2. Polarized sunglasses are better than ordinary sunglasses? Polarized lenses and ordinary sunglasses are not good or bad, but different occasions should choose sunglasses with different functions. Polarized sunglasses can block the scattered reflected light, glare and irregular reflections of objects in natural light, so that the light can be injected into the visual image of the eye on the transmission axis of the track, making the field of vision clearer and more natural, generally suitable for driving, fishing, sailing, Outdoor activities such as rafting and skiing. Since polarizer lenses are generally darker in color, they are not suitable for use in cloudy days or indoors. 3. Sunglasses are only suitable for summer? In our daily life, sunglasses seem to be remembered only in summer when the eyes are burned by the sun. In fact, sunglasses do not only need to be worn in summer. The main purpose of wearing sunglasses is to cut off ultraviolet rays, which exist all year round, which means that sunglasses can be worn all year round. YC9708 Universal Sunglasses C7 Black Frame Silver Legs/Lens Gray 4. Sunglasses can be used continuously for many years? Generally, the lens materials of high-quality sunglasses are made of special materials, and they will age with time. Incorrect wearing habits may also damage the sunglasses, or even cause deformation, loosening, and shorten the service life. Therefore, it is recommended to replace new sunglasses in 1-2 years. 5. Sunglasses are not suitable for children and the elderly? It seems that those who wear sunglasses around are fashionable young people. Many people think that sunglasses are the patent of young people. In fact, wearing sunglasses for the elderly and children is also a positive way to protect eyes. However, children under the age of six should not wear sunglasses. Their visual function is not yet mature, and objects that wear sunglasses will become dark, which will affect visual development or form amblyopia. Related Reading: Sunglasses and Sunglasses

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