Lens Material

The following information shows the index of specific materials.

Lens Materials

1.50 Index CR-39 Plastic Great optics, Good scratch resistance, cost efficient great for low power RX

1.53 Index Trivex Impact resistant, will not crack, great for full rimless frames

1.59 Index Polycarbonate Impact resistant, best for light weight, thin and cost efficient

1.60 Hi Index Polyurethane Thin for strong RX’s good for full rimless

1.67 Hi Index Polyurethane Best all around for Strong RX’S

1.74 Hi Index Polyurethane Highest index and potentially thinnest material available Very Strong Rx’s