Ophthalmic Cr 39 Lenses Uv Protection 1.499 Single Vision Anti Reflection

1.499 Single Vision Prescription Anti-Reflection Ophthalmic Lenses In CR39
 
I. Specifications:

 
II. Features:

Aogang CR-39 lenses use the true value of imported CR-39 monomer, the longest history of resin material and the most widely sold lens in middle level country.

1. Compared With Glass Lens

1) It’s inexpensive, since it’s been around for over 70 years. Optically speaking, it has a good, reasonably smooth refractive surface, and very little distortion at the edges of the lens

2) The big advantages of CR39 lenses over previous glass lenses were light weight, and better shatter resistance. The lower weight allowed eyeglass makers to experiment with larger size lenses, since CR39 is much lighter in weight.

3) Glass lens almost has no UV protection, but CR39 lenses can protect eyes from UV380.

Compared With Other Index Optical Lens Hardness: The best among other index lenses in hardness and toughness, high impact resistance. Tintable: The most easily tinted than other index lenses. Transmittance: The highest transmittance as compared with other index lenses. ABBE: The highest ABBE value providing the most comfortable visual experience. Consistency: The most reliable and consistent lens product physically and optically.

III. Coating Choice:
 

Depending on the layers of coating, lenses differ in functionality. Coating consists of much technicality as much as lenses do, here is 'how lens coating works' for your reference.

Hard coating: It also can be called anti-scratch coating, is to enhancethe hardness of the lens to prevent the substrate scratch   AR coating: It also can be called hard multi coated or anti-reflection coating, is to protect the lens effectively from reflection