Part of great system for tennis, cycling, driving, chores outside - Bolle SwiftKick Prescription Rx SOS Adapter TRU 50072 - CR-39 Clear Lens

Over time lenses get scratched.
This prescription adapter gives you clear, wide angle vision. It is protected from scratches by the overlying Bolle sunglass lenses that can be replaced when they inevitably get scratched. So you get a system that gives you great wraparound prescription sunglasses at a bargain price over time.
This is my second single vision adapter prescription lens. I finally (sob) lost my first pair of Bolle Swiftkick sunglasses that I have had for five years. I had replaced the polarized sandstone lenses twice that I use for tennis, cycling, driving and outside chores, as they inevitably got scratched.
(I also have a pair of bifocal prescription inserts that I use in another pair of Bolle Swiftkick sunglasses that I use for reading outside, and tying on flies while fly fishing.)
Pros: Clear vision while allowing use of replacable Bolle lens

This review was written in the old system and had content requirements that are different than reviews written today.