The functions of Sunglasses

 The sunglasses looks very simple,two pieces of color plastic or eyewear’0073 lenses into metal eyewear or acetate eyewear.  

In fact, the two pieces of sunlenses can cause quite many differences.

When you use sunglasses, these differences will have a great impact on you.


Good sunglasses must have the following four functions:

 1.  To prevent ultraviolet radiation in sunlight.UV rays can damage the cornea and the retina; high-quality sunglasses can completely eliminate the UV radiation...