When choosing eyeglasses, at first you should know your purpose: for sun-shading, clothes matching, or for decoration? Besides sun shading, do you ask the function of preventing UV? Is there any special requirement on the safety performance of lenses? We are able to buy a suitable pair of sunglasses only when we clear up these questions, considering the style and actual effect when wore.

To protect eyes, we can choose sunglasses with the function of preventing UV, which can eliminate UV below 380nm. The lens of the sunglass which has the function of safe guarding is made of PC chips and other resistant materials. They are good choices for moorbike riders, drivers and other consumers that have special requirement for high safety function.

Consumers should ask complete package when buying sunglasses and conserve it well. This is manufacture’s promise to product capacity. Or let the merchants specify these additional protective functions on the invoice, as soon as the event of disputes, you would not be passive due to lack of evidence.

The choice of lens color should depend on the required place for activities. If you want the cheap eyeglasses to effectively block the light in summer, the color of glasses should be dark sufficiently. As to those who ride or drive should not choose the lens of too deep color, otherwise it will affect the ability to distinguish, or even causes accidents.

The color of lans should be proper and is able to make the color of surrounding environments non-distorted. Before wearing sunglasses, first observe the red, green and yellow objects. Then put on sunglasses and observe the same objects, so that you can test the lens.

Light gray, dark brown and smoky colours are best among the colours of the lenses. Green, amber, blue are as followings, red is only used when we have a sunbath or on a snowfield. Improperly wearing sunglasses may cause eye disease. It is not necessary to wear sunglasses in cloudy or indoors.

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 as well as children whose vision system does not develop completely are not suitable for wearing sunglasses?

Except the glass sunglasses, other lens material has a lower abrasive resistance. Users should watch the surface of reading glasses frequently. When the wearing and tearing is affecting the clearness, you should replace them in time.