The sun radiation protection glasses how to choose and buy

Radiation including many kinds of cell phone radiation, computer radiation, solar radiation, such as sunglasses primarily prevent solar radiation, reduce glare, especially to prevent ultraviolet radiation damage to the eyes, in order to protect the health of the eye, can choose the sun radiation protection glasses. Ray-ban RB2447 - F men sunglasses 901/4 j black/dazzle colour green before the choose and buy sunglasses, must first identify both. One is not all sunglasses have ultraviolet prevention function. Eyes meet with strong light, the pupil will naturally become smaller, cut into the eyes of uv energy, once without uv protection function on the glasses, can make the pupil dilation, plus the role of the glasses not isolate uv, is equal to the portal open eyes at this moment, let into the ultraviolet ray, damage to the eyes. Second, sunglasses can prevent ultraviolet ray, because the lens and add a layer of special coating, and inferior sunglasses not only can't block ultraviolet light, also let the lens completely the serious decline, make the pupil larger, ultraviolet ray can raking instead, damage eyes. In addition, the inferior lenses also make a person appear nausea, forgetfulness, insomnia and other visual fatigue. How to choose a good pair of anti-radiation sunglasses? The following points can be used as a reference. 1) Check the ultraviolet prevention function identifies a pair of sunglasses to whether have the function of anti ultraviolet, we won't be able to identify with the naked eye, the manufacturer of the product is an express promise consumer choose and buy has the protective function of sunglasses only reference, we can see in some of the product label and glasses positive such as: '100% of ultraviolet prevention', 'UV400', 'cut off all of the ultraviolet ray,' 'anti ultraviolet express identity. ' 2) Check the safety performance of the logo has the safety performance of sunglasses, the lens using impact resistant materials, such as PC tablet on the label and manual tend to be marked 'shock resistance' and 'through the FDA certification', 'conforms to the highest standards in Europe and America and so on, if the product can meet the requirements of logo on, motorcyclists, drivers, etc have special request for the safety of consumers is a good choice. Commitment to the product identification, consumers should learn to protect themselves, keep the label or instructions or good, or let the merchants marked on the invoice, in the event of dispute, we would not be a lack of evidence and passive. Ray-ban sunglasses RB4222 men 622/8 grind arenaceous black/lenses grey 3 g) Degree of the lens should meet the requirements of the flat lens, and should not have affect vision optical spot disease. Simple identification method for, can put sunglasses in sight, observations of distant places through the lens, such as window frame or door frame, then glasses from top to bottom and move around, goals should not have swings and wavy deformation. 4) The sun lenses made of glass and resin, and the best sun glasses polarized lens should be used. It USES as well as contact lenses and precision made of synthetic resin, synthesized from seven layer chip, and two coat of super hard wear-resisting layer. Second, six is shatterproof strengthening layer; The third and fifth layer is the uv filter layer, the middle layer is polarized filter layer. Polarized lens can effectively filter out reflected light and harmful uv rays, and resistant, wear, and other functions, is the most popular sunglasses. 5) 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. 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.
related: sunglasses polarized radiation protection glasses