Me and another team mate are blessed with needing glasses, and we both manage comfortably with Proflexes.. As far as lenses go, the closer to your face the better, but my glasses are quite large square frames and they still fit well.
The only thing I would say is, having that extra "lense" in there will mean you're gonna fog up a lot more than usual. If you can get a fan for your mask that might help, but, unless your vision is truly awful, I find playing sans glasses is just easier... Even if it does require a couple more leading shots.