They can be made with CR-39, polycarbonate, or high-index lenses. Trivex lenses ($200 for single vision, $400 for progressives) are more scratch-resistant than either CR-39 or polycarbonate lenses.

High-index plastic. If you need a strong prescription , these lenses are lighter and thinner than the old-school super-thick ones you may have had in the past. Aspheric.

The lenses features clarity of Abbe number 41, has a density of 1.23 g per cubic centimeter and refractive index of 1.60, and protects against 100% of UV radiation.

Mitsui Chemicals, Inc. (Tokyo: 4183; President & CEO: HASHIMOTO Osamu) today announced that its MR™ series of high refractive index lens monomers has been pi ...

Mitsui Chemicals, Inc. today announced that its MR™ series of high refractive index lens monomers has been picked up and launched as the standard option in glasses sold by major U.S. retailer ...