It depends on the size of your glasses and, well, your head. I tried a demo unit with that in mind so I brought my night glasses (currently wear contacts since my current prescription calls for too thick lenses and they hurt my nose) and a friend's hipster frames. My kinda-regular glasses fit in there semi-comfortably (if you've ever tried putting sunglasses on top of your existing glasses you'll know what I mean) but the large, hipster frames couldn't do it.