Bolle Optic Rx Lenses are available in the following bifocal lens materials:
CR-39 Plastic (also known as hard resin) is overall cost-effective & most commonly used lens material. CR-39 is thinner and lighter than glass. Recommended sphere range is 0.00 - +/-8.00 and cylinder range is 0.00 - +/-2.00
Polycarbonate is the most impact resistant lens available. Polycarbonate lenses are highly reccommended for kids, sportsmen and military. This lens material is thinner & lighter than CR-39 or glass. It blocks UV rays. Anti-scratch coating is included. Recommended sphere range is +/- 2.00-8.00
Aspheric Polycarbonate lenses feature the same properties as polycarbonate lenses, but they are recommended for plus (+) sphere prescriptions only
High Index 1.60 (also known as HX 1.60) lenses are thinner & lighter than CR-39 or glass. Recommended sphere range is 0.00 - +/-15.00
High Index 1.67 (also known as HX 1.67) lenses are thinner than Hight Index 1.60, CR-39 or glass. Recommended sphere range is 0.00 - +/-16.00
Glass lenses feature superior optical quality and scratch resistance. Although glass is heavier and thicker than other lens materials. Recommended sphere range is 0.00 - +/- 3.00
These Bolle Optics Caen are also available without Rx lenses: