Polarized Lenses

Self-reflection: good. Surface reflection: not so good. Eliminate distracting polarized, aka reflected, light from reaching your eyes. That means a drastic reduction in the brightness of shiny surfaces, like chrome, and large bodies of water.

Gradient Crystal Lenses

The crystal lens is tinted on the backside using high vacuum processes. This allows the adhesion of thin layers of oxides to the lenses to achieve smooth colour transitions.