LPT: If you wear glasses and go to watch a 3d movie, pop out the plastic lens in the 3d glasses and tape it on your prescription pair.
Either bring a roll of clear tape or stick two 3in pieces to your credit card. (So you can peel off and use later) Next, we pop out the plastic 3d lenses out of the glasses. Should be pretty easy since they're so thin and flexible. Finally you can just tape them over your regular glasses. Try to keep the tape at the edges so you can still see of course.
As someone who wears prescription glasses, it's super annoying when I have to put a second pair of cheap plastic glasses on top of my face. I try to avoid 3d in general cause i don't think it's worth the premium and slightly nauseating. However some of the newest movies only offer 3d options or a garbage showtime at like 4pm. I've been doing this for a while and I hopefully you can find it useful :)