Before we decide to buy sunglasses, we should make sure whether our purpose is to block sunlight, or to match with costumes, playing a decorative role first. In addition to protect ourselves from the sunshine, are there any other requirements about anti-ultraviolet function? Are there any special requirements for the safety of lens? Only clearing these goals, combining the style with the actual effect of wearing on your face can you buy a pair of suitable sunglasses.

To protect eyes, we can choose sunglasses with the function of preventing UV, which can eliminate UV below 380nm. The lenses of sunglasses with safety and protection property are made of such materials of shock resistance as PC lenses. For motorcyclists, drivers and other consumers who have special requirements on the safety performance of the lens, it is a good choice.

Consumers should obtain the complete package and save it well when buy products. These are the commitments of the product performance of the manufacturers. Or you can ask dealers to mark these safeguard functions on the invoice. If dispute happens, you won’t in passivity because of lacking proof.

How to choose the color depth of lens depends on place required. If you want the eyeglasses frames to effectively block the light in summer, the color of glasses should be dark sufficiently. But it had better not to choose the deep color lens for the riders and drivers, otherwise it will influence the resolving ability and even occurs the accidents.

The color of sunglasses can’t be bias and won’t make distortion of colors of around scenery. Observe objects of red, green and yellow before wearing sunglasses. And then put on sunglasses to observe the same objects to test whether the lenses have the color problem.

Sunglasses lens color had better be light gray, brown or smoke color. Green, amber, blue are as followings, red is only used when we have a sunbath or on a snowfield. Wearing sunglasses improperly can catch eye illness, and there is no need to wear sunglasses indoors and on cloudy day.

Some people wear sunglasses regardless of the occasions or the sunshine. This would definitely increase the burden of eyes accommodation as well as the stress and tiredness of eye muscles, which would cause ision loss. Babies and children whose visual systems are not developed completely are not suitable to wear sunglasses.

In addition to glass sunglasses, the wearing resistance of other lens materials is not great. Users should always note the surface condition of glasses framess, when the wearing impact the clarity, you should replace them promptly.