A thinner lens material, referred to as higher index lenses, can improve the comfort and cosmetic appearance of your lenses by allowing vision correction with a thinner and lighter lens. You may want ...

But it’s not available in all brands and types, he points out. Cons. Soft contact lens material can absorb particles, chemicals, bacteria, and mold more easily than hard and rigid gas-permeable ...

The second lens offsets any aberrations that do occur in the first and is a different material, helping to reduce the spherical effect that the first lens produces. The third lens corrects the ...

It often depends on the material and condition of the frame. Some optical professionals can cut lenses to fit frames of similar or smaller sizes. This option offers a way to keep your favorite ...

However, by the 1980s, consumer distaste for radioactive things and concern for factory workers ended the production of hot camera lenses. Thorium is the most abundant radioactive material on ...

Phakic IOL technologies have undergone substantial improvements in recent years, with progressive upgrades in design and ...