Sheril lisa C.wrote a review of Oakley Dart Sunglass - Women's on March 22, 2012
I bought these specifically because Oakley advertised that you could buy replacement lenses for around $50. Well, it seems, from speaking with Oakley, that the lenses are back-ordered for months and becoming less available and he highly suggested I just get a whole new pair.
I happned to make them work with my climbing helmet (ancient BD) and the lenses were sharp and wonderful until I scratched the crap out of them from gear and rock. The gradient lenses are great for looking down and dealing with gear then looking up to your climbing partner going into the bright light.
Also, they make you look like a rock star.