What do I need to know about impact resistance and lenses?

Sunlenses are made from a number of different materials, some of which have good impact resistance and some which are poor. We believe that sunglasses will be worn when playing sports or driving or a myriad of other activities where an impact might occur and so our view is simple: high impact resistance is crucial.

For us, this rules out glass and CR39 which have good optical properties but poor impact resistance and leaves two serious contenders: polycarbonate and  NXT®/Trivex®.

Polycarbonate is cheap and has good impact resistance, but has mediocre optical properties.  NXT®/Trivex® is expensive and has excellent impact resistance and optical properties.

All our lenses are manufactured from  NXT®/Trivex® .