I have been doing some research on the impact resistance of various brands of sunglasses...

Today I bought a pair of these.

http://au.oakley.com/products/6594/24654(the Black ones)

The lenses have zero optical disortion and seem to enhance detail in bright sunlight..

I'm very impressed.. but the best part is they are resistant to high velocity and high mass impacts...

A nice thing to have if your heli throws a blade in flight (it happened to me once)

These impact tests are impressive!

http://www.oakley.com/innovation/opt...act-protection</p>