I bought my prescription Ray-Ban sunglasses from Blue Ridge Optical on Electric:
blue ridge optical loc: Troutville, VA - Google Maps
These are the RBs I own:
RB2015 Ray Ban Sunglasses - Ray Ban Daddy-O 2015 Glasses
They're the most comfortable sunglasses I've ever owned, and the polarized lens is so effective at reducing glare and increasing color contrast that you can wear them up until just before twilight, which make them ideal driving glasses. What you don't see in the product photo above are the rim protrusions that block sunlight even when the sun is directly above you. I've had them for 12+ months and wear them daily. Even back when we were on the farm and I was doing alot of outdoor work (trimming, cutting, carpentry etc) scratches never developed. Which is more than I can say for my fru fru regular eyeglasses which after 18 months look like a crazed ferret attacked them
I'd definitely recommend you try the RB Daddy-O model. The contour of the nose bridge on those glasses is ideal. I don't have discomfort issues and the upper bridge of my nose is fairly wide thanks to the native american in me. Typically to get glasses to stay up I have to angle the pads such that they create some discomfort after awhile. That's not the case with the Daddy-O.
Sean