Four kinds of wearing sunglasses can not easily

Sunglasses fashion, beautiful, radiation protection, these features make people more like to wear sunglasses, concerned expert points out, however, when choosing sunglasses to be careful, not only focus on the style, but ignore the sunglasses itself quality problem. To tell you four unqualified sunglasses don't wear the following: the first kind of socket, uv protection function of sunglasses. Good lenses, can stop more than 99% of the ultraviolet ray, and identify UV400 lenses are 100% ( 99. 99%) Block uv rays. With uv protection function of sunglasses, the eye is like in a dark room, the pupils get bigger, the remnants of ultraviolet ray will be raking in the eyes, make the eyes hurt. Good to store to buy or in high-profile online flagship store to purchase. Small must not enough to buy out of the carpet, although those sunglasses can block ultraviolet light, but the lenses work are not in place, also is not qualified, don't because is cheap to buy it, bad eyes can cause different degree of damage to the eyes. Second, the transmittance unqualified sunglasses. After wearing the sunglasses, can produce traffic signals to identify obstacles, easy to cause traffic accidents. Except for myopia glasses and reading glasses) 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. The third category id, not the labeling of sunglasses. Sunglasses generally divided into three classes, namely for sunshade shade mirror, used for decoration light mirror and used in special mirror snow goggles or waterproof surface radiation. If there is no product category id, when consumer is buying can't correct recognition of the use of sunglasses, affect the use effect. Fourth, the fight against performance does not meet the requirements of sunglasses. Lenses easily broken when impacted by external force, debris could become a fatal injury to the person's eyes. Picture frame material is very important also, general with plates, aluminium magnesium alloy, pure titanium. Different demand to the requirement of the sun is different also, have special used for movement of the polarized light sports mirror, polarized light driving glasses, polarized lens fishing, etc. , when buy, can ask the professional use of clear sunglasses.
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