Polarized lenses made of synthetic resin, the outermost two layers are super hard wear-resistant layers, the second and sixth layers are anti-shatter strengthening layers; the third and fifth layers are ultraviolet filter layers, and the middle layer is polarized filter layer . This kind of polarized lens can effectively filter out reflected light and harmful ultraviolet rays, and has anti-shatter and anti-wear functions. The development trend of lenses is: ultra-thin, ultra-light, ultra-abrasion-resistant, ultra-flat, ultra-transparent, ultra-sturdy, ultra-violet and electromagnetic waves. It is worth mentioning that the coated lens, some parents still don’t know, the light transmittance of the lens is increased from 91% to 98% after the coating. The better the light transmittance of the lens is beneficial to the improvement of vision, and it can also be used to a certain extent. Slow down the development of myopia. Furthermore, many mischievous children are prone to fall or bump. If the lens of children's sunglasses
is fragile, it is easy for the child to be injured.