POLYCARBONATE - CÉBÉ ZONE LENS
20 times more impact resistant than glass and substantially lighter (the specific gravity(1) of a polycarbonate lens is 1.22g/cm3 compared to 2.53g/cm3 for a mineral lens), polycarbonate lenses offer the best combination of protection, performance and visual comfort. Our new Sensor High-Contrast lenses are made of polycarbonate.
(1) Specific gravity describes the density of a lens material by comparing its density to the density of water.
MINERAL - CÉBÉ PEAK LENS
Thanks to its Abbe number(2) (58) much higher than the one of polycarbonate (29), mineral lenses are the best for optical clarity. They also offer maximum scratch resistance and durability.
The Cébé Peak lens is perfect in high-altitude, desert or other environments subject to exceptional light intensity or weather conditions.
2) Higher value means better optical quality. The Abbe value is used in RX to determine the geometry of the lens. For plano lenses, the Abbe value does not have influence as they are 2mm thick.