the weight is very light,it is only about half of mineral lenses. And it is not easy to be impacted. its diapersive coefficient Vd. is small. Transmission rate is high. This lenses can be tinted,hard cocated and multi coated. it adapt to making Aspherical and progressive lenses.
Features:
the weight is very light,it is only about half of mineral lenses. And it is not easy to be impacted. its diapersive coefficient Vd. is small. Transmission rate is high. This lenses can be tinted,hard cocated and multi coated. it adapt to making Aspherical and progressive lenses.
