How to choose lens with good quality

 Lens to four, carefully choose the lens, a look at whether the glasses enterprise has obtained the Glasses Usa Shipping Time product production license; Second, the optometry equipment and testing instruments of the eyeglasses enterprise have qualified marks; Three to see whether optometry, production personnel with certificates; Four to see whether the Can You Return Glasses have qualified mark (certificate). The quality of the lens is an important factor to determine the quality of a pair of Kids Eyeglasses. At present, there are optical glass, resin, Mr Lens and PC lens on the market. Ordinary Kids Glasses lenses are cheaper and scratch resistant but heavier; Resin and PC lenses are lighter and not easy to break, especially PC lenses, can get rid of the rhinitis and headache caused by compression of the bridge of the nose pain, while the love of sports is safer. MR lens is a high refractive index lens material with balanced performance index. The lens is thin and thin, with clear vision and high pressure resistance. The lens is not easy to be damaged. From the point of view of aesthetics, the lens with high refractive index should be selected for height number.