For prescription glasses, 39dollarglasses.com did me right. you'd *better* feed them the right data though, it's a prime example of "you get exactly what you ask for, no more, no less". Still, my $100 experiment landed me a set of glasses that are off, but really nice frames I can use again with other lenses. Live and learn.
I have -7 or -7.25 (remember wat I said about data?) vision and I can't *stand* slipovers.