I have a pair of Oakley Crossrange XL frames with prescription transition lenses from SportRX (called ‘the one’ or similar, I think.)
The lenses are, frankly, awesome. Prescription is bang on, beautiful tint (these are SportRX lenses, not Oakley prescription, so I can’t speak for those). The frames are OK, not the best on me at least, but I still use the glasses a lot for casual rides, commuting, hiking etc. The lenses go so clear they can be used for night rides. If I do this again, I’ll get a prescription-capable frame and test it on alot of rides (with contacts), and then if I like it have high-quality prescription lenses added.
Even with the SportRX Crossrange glasses available, for a big ride or real road rides, I’m still gonna use my contacts and a full sport frame (Julbo transitions) with their better coverage, comfort and grip.
I used a pair of Smith Pivloks with their prescription insert in the past (insert clips onto the nose piece). Worked OK, great frames, prescription was OK and it was nice to be able to combine it with the the easy-change pivlok lenses. But I used contacts most of the time anyway, because I can. That says something. I wouldn’t invest in that route again, though it might work ok for others.
Although I used SportRX for the Oakleys, I should add that a good local optician could probably cook up or order a similar lens.
Hope this helps.