How to choose sunglasses by function

Sunglasses can be divided into three categories according to different functions: sun-shade sunglasses, tint sunglasses and special sunglasses. And on the other hand, there are mens sunglasses, womens sunglasses, design sunglasses, tennis sunglasses, fashion sunglasses and so on.

Usually speaking, sun-shade sunglasses are used for sun shading. For human adjust light flux by adjusting the size of pupil, when the intensity of light goes beyond the capacity of adjustment, it will cause damage to our eyes. Therefore, we wear sunglasses to protect our eyes from the sun in the open ground.

The tint sunglasses are functionally inferior to the sun-shade sunglasses, however, it has its own advantages. With rich colors, it can go well together with various kinds of clothing and it has pretty good decoration functions. Because of tint sunglasses’ abundant colors, various types, it has gained good reputations from the youngs, especially young ladies!

The last category is the special sunglasses which owns super ability to barricate the sunlight. Often used in situations like surfing, skiing, climbing, golfing and so on which are usually in wild and the sunlight is very powerful. The special sunglasses’ capacity of anti-ultraviolet radiation must reach a relatively higher level.

Different people choose different kinds of sunglasses driven by different fancies and usages. But what’s the most important is that the sunglasses you buy can protect your eyesight and health. The basic functions of sunglasses should be as follows: reducing the stimulation of strong light, viewing things clearly and not distorted, anti-ultraviolet radiation, recognizing colors veritably and identify traffic signals precisely. If there is any functions among the above ones are lacked of, the result will be serious. You may feel faint or have ache in eyes, sometimes you will react slowly, recognize colors distorted and even walk without balance. These symptoms are likely to cause devastating consequences. Above all, when you choose sunglasses you can not only concern about the fashionable style but also the inner quality.
 

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