Just looking on RX, the genuine Oakley lenses add around £150 to the cost are they really worth that much premium over 'standard " lenses ?
What's the difference ?
What are 'standard' lenses? The thing is, a set of replacement Oakley sunglasses lenses will cost the same.
You might be better off finding the Oakley frames you like, then getting the optician to glaze them with regular polycarbonate lenses. I have some Oakley WHY 3 frames, which were sold specifically for Rx lenses; one pair I had glazed with Rx Fire Iridium lenses, the other with ordinary clear polycarbonate by Vousden, which were a lot cheaper.
In my humble opinion, it's only worth going the Oakley route for Rx lenses if you want them to have an Iridium coating and to be sunnies, or to have them with a photo-reactive and Iridium element, in either case you're looking at £260+