Lens Materials

Plastic
   Also known as CR-39.  This is the industry standard and go-to lens for most patients with low prescriptions.  It offers clear visual acuity, but minimal scratch/impact resistance.

Polycarbonate
   Lightweight and tough.  Recommended for safety/sport glasses or people with moderate prescriptions.  Thinner than plastic lenses and more impact/scratch resistant. Offers 100% UV ray protection.

Phoenix/Trivex
   Lightest lens material available worldwide.  Very strong and extremely scratch/impact resistant.  Recommended for safety/sport glasses, drill-mount/rimless frames, children, and moderate prescriptions.  Offers 100% UVA and UVB ray protection.

Hi-Index
   Polyurethane compound that creates the thinnest material available.  Offers high-definition visual acuity.  Made in several indexes: 1.60, 1.67, 1.70, and 1.74.  Each index represents a thinner and lighter lens.  The 1.60 index is about half as thin as regular plastic.  Each additional index decreases the lens thickness by almost a third. Hi-Index lenses also drastically reduce or eliminate eye magnification due to far-sighted (hyperopic) prescriptions.  Recommended for those with moderate to high prescriptions and especially for those who are far-sighted.