How to choose the sun glasses

Summer sun glasses are very popular, but many people don't know how to choose and buy, just choose oneself to like, from appearance on sunglasses, there are a lot of knowledge! Ray-ban RB4187 - F unisex sunglass 856/13 hawksbill box tea slice of the function of the sun glasses have? 1, covered the sun: the reason for the most basic functions must be sunglasses. Sunglasses are called 'sunglasses' comes from it as the most fundamental role of protecting our eyes. But not need sunglasses in the summer, as long as strong light bright to let you feel discomfort, you need to wear sunglasses to avoid damage. 2, save time, to go out but the dress up time at ordinary times what should I do? This time you will need a pair of sunglasses. Star out of the street there are many directly without makeup, plus a pair of sunglasses, but as long as there is the role of the sunglasses, can still keep their commanding aura. 3, sports protection: you can use it to isolate interference when sprint stable mood, which run faster; You can use it to cover when climbing uv damage, see more beautiful scenery; When shooting you can use it to avoid the interference of light, to get higher scores. 4, professional requirements: driving a car for a long time people especially need a pair of sunglasses. Choose a pair of suitable sunglasses can effectively alleviate eye fatigue, avoid danger. 5, tie-in dress: no matter what are you going to wear at ordinary times, go out don't forget to choose a suitable dress sunglasses, today can give oneself add cent many oh. How to choose the sun glasses? 1, observing packing: first to see if the lens have scratches, impurities, bubbles, 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. 2, observation mirror: use sunglasses two horns on the fluorescent lamp in hand, 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. Lens to level off, through higher acuity, sun lenses made of glass and resin, and the best sun glasses polarized lens should be used. 3, try: choose to wear sunglasses have try the feeling of dizziness, headache. Now there are some marked degree of myopia sunglasses on the market 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 best not to choose this prescription sunglasses. 4, whether UV protection: wear sunglasses in addition to reduce glare, make the eyes comfortable outside, the main purpose is to prevent ultraviolet damage to the eyes, and whether the lens color and UV protection are two different things, even if the lens color deep, also won't be able to effectively prevent UV, UV resistant are marked so be sure to choose the lens. Usually sunglasses UV index at 96% 98%. 6, according to the situation: the color 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. In general, black, dark brown, grey filter effect is good; Grey lens for any chromatography can balance absorption, wearing glasses can see scenery will only after dark and do not have clear off color, Dark brown lens can filter out a lot of blue light, which can improve visual contrast and clarity, under the condition of air pollution is serious, or foggy wearing effect is a plus. Ray-ban RB2447 - F men sunglasses 901/4 j black/dazzle colour green piece why choose light color sunglasses? Wear too deep color glasses can make eyes in a dark room environment, the person's eye pupil in dark environment will automatically expand, pupil long-term expansion easy cause diseases such as glaucoma; Inferior sunglasses also can cause more ultraviolet penetration eyes, easy to cause the sunlight keratitis, corneal endothelial injury, eye diseases such as macular change color; Darker glasses make the eye's ability to distinguish colors, it's easy to have a color confusion, causing a traffic accident. Summer should try to wear sunglasses in the outdoor, but not all are suitable. Without the sun shade, can take the sunglasses off, let your eyes rest in natural light offline for a while.
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