A thinner lens material, referred to as higher index lenses ... You may want to consider Transitions photochromic lenses for your primary pair of glasses. They adjust automatically to changing light ...

You undergo an eye exam, then face a barrage of decisions at the optometrist's office: lens materials, coatings, prescription lens designs, while usually being pressured to purchase another new frame.

The starting point for the lens was a CAD model, a 3D printer, and silicone mold material. Clear casting ... The next goal is printing prescription glasses, and [Florian] seems very close to ...