When I wear my glasses (which, now that I'm out of lenses, is all the time) I usually go a little heavier on the makeup. The way my prescription is, my eyes tend to look a little smaller behind them, so going heavy is my way to counteract that.
Plus, you can get away with a LOT more due to glasses creating natural shadows on your face! Meaning that bright, terrifying lime green that you may be too scared to wear otherwise may look quite a bit more toned down with glasses!