Sun glasses are sight care products serving to prevent hurt to human eyes caused by stimulation from strong sun light. As people's material and cultural level increase, sun glass could also be the special decoration for beauty or for embodying the individual's style.

According to the functions, sunglasses is generally divided into three types: common sunglasses, light-color sunglasses and sunglasses with special function.

As the name suggests, sun protection reading glasses are for preventing sunlight. Generally, people should adjust luminous flux through adjusting pupil in the sun. When the intensity of light exceeds the regulation capability of eyes, it will cause damage to So when people are outside especially in summer, many of them wear sunglasses to reduce the tiresome from eye's modulation or the hurt from fierce sunlight.

Light eyeglasses frames are not of the same effect as sun block glasses in obstructing from sun burning. But because of its various colors, they suit a variety of dresses which produces excellent match. Light-colored sunglasses because of its rich colors, styles and diverse by the family of the favor of the young, fashionable women to their more favor for me.

The sunglasses with special function have strong sun protection effect, and usually used outdoors with intensive sunlight, such as beach, skiing and mountain climbing. They have higher requirements on the indexes such as uvioresistant performance.

Different groups of people select glasses frames in accordance to personal favors and purposes, the basic principle of which is to guarantee safe wearing as well as zero damage to sight. The basic functions of sunglasses should be that they can reduce the stimulation of strong light, preserve the clarity and real shape of visual materials without distortion, anti-UV, recognize the real colors of things and accurately identify signals of t If the above functions are defective, the consequences range from loss of sunglass' functions and consciously inadaptable symptoms as dizziness as well as sour and swollen eyes. Sometimes, such symptoms as slow response, color discrimination illusion and uneven vision when walking will occur, to cause traffic accidents. So you should not choose the sunglasses only by its design, while ignoring its inherent quality. There are several points which the costumers should pay attention to when choosing a pair of sunglasses.

From the above description of several types of sunglasses, we know that there are different types of sunglasses for different occasions and the crowd. Therefore, when choosing sunglasses, the individual purpose of whether to shelter from sunlight, to match and decorate trappings should be identified. Whether you have the requirements on UV resistance function besides sun protection? Whether you have special requirements on the safety performance of lens? Only you are clear about these purposes, can you buy a purchase a suitable sunglasses by combining the purposes with their styles and the real effect of your face.

Not all sunglasses have anti-ultraviolet functions of a standard to meet the basic requirements of sunglasses can only be said that block glare at the same time not through more UV light. If the sunglasses can only prevent intensive light but cannot prevent the equal ultraviolet light, the wearer will receive more ultraviolet light than when they don't wear sunglasses. Sun glasses sold in shops, usually there are obvious signs on their glasses, brands or the out packing which is just like that there is the description of ingredients of material on clothes. Consumers must check closely when buying.