Here's what other sites are saying:
Go ahead- spoil yourself with Optic Nerve's Crenshaw sunglasses. The unique 10x5 dual-base curve reduces distortion while increasing peripheral coverage and range of vision. With a more flat vertical curve, your cheekbones and brows won't be crowded while the fashionable oversized lenses flatter your face.
- Mountain Gear
CLOSEOUTS . A dual base curve design reduces distortion and improves peripheral vision in Optic Nerve's Crenshaw sunglasses, a wraparound shade with large lenses for total coverage. Available Colors: SHINY CRYSTAL RED/BROWN.
- Sierra Trading Post