We offer THIN AND LITE lenses in our packages (frame + lenses). This is usually the Trivex material, which has the lightest weight of all the materials available. They're also much more impact resistant and deliver much crisper, distortion-free vision than the other materials. Trivex works particularly well with "rimless" glasses as it won't crack around the holes which are drilled in the lenses. We polish all our Trivex edges to produce a glistening, jewel-like quality. When coupled with anti-reflection coating the end product is truly beautiful lenses!