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Buying sunglasses tips

by:Eugenia     2020-08-30
When go out wearing a pair of sunglasses, not only can keep out ultraviolet ray, protect eyes from harm, or cool dress up as handsome. No matter you are the fashionistas or street tide male of female, the growing popularity of sunglasses is a necessary item. However, buying sunglasses tips how much you know? The first, first to see if the lens is a scratch, bubble, impurities, stripes, check the packing for sunglasses, regular sunglasses should be marked with name, color, diameter, quality levels, production factory name and trademark, the mirror or tags are marked as both uva and uvb rays and ce mark sunglasses can ensure that block uv. Second, choose and try to wear the sun glasses have the feeling of dizziness, headache. Now there are some marked degree of myopia sunglasses for sale, but because of pd and other indicators vary from person to person, so if there is no guidance of professional personage, consumer is good not to choose this prescription sunglasses. Third, with the hand, take the sun glasses two horns on the fluorescent lamp, let the mirror reflective article gently rolling, if it is found that mirror the daylight lamp shades appear wavy, twisted, prove that the lens is not flat, the mirror can damage eyesight. Fourth, the lens should level off, through higher acuity, sun lens material has two kinds of glass and resin, and a good sun glasses polarized lens should be used. It USES as well as contact lenses and precision made of synthetic resin, synthesized from seven thin slice, the two outside layer is hard wear-resisting layer; Layer 2 and layer is 6 shatter-proof strengthening layer; Layer 3, 5 is uv filter layer, middle layer is polarized filter layer. Polarized lens can effectively filter out reflected light and harmful uv rays, and have a shatterproof, wear, etc. Fifth, the colour of the sunglasses in addition to according to your own color, face, dress to match, also should choose according to in and out of place. Generally is better to dark gray, dark brown, dark brown and black, blue and purple is poor, because the two lenses will be through more ultraviolet light.
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