To watch a 3D movie, I need to wear special glasses to create the illusion of depth and create the feel of a 3D scene in the brain.
What is the best way for people wearing glasses to watch comfortably a 3D movie.
There are a couple ways to go about a clip-on solution that might be appealing to people not comfortable wearing contacts or glasses over glasses.
There is a detailed post about creating 3D Clips For Prescription Glasses that addresses this precise issue.
The simplified version is: use a set of clip-on sunglasses, harvest the lenses from a set of theater glasses, pop the lenses out of the clip-on, use them as a template to cut replacements from the 3D glasses, and pop in your new 3D lenses.
Note: I'm comfortable wearing 3D glasses over my glasses so I have not used this DIY technique.
Companies have figured out that people who wear glasses sometimes want to watch 3D movies and have started producing clip-on solutions. The notable boon to a commercial option is not having to deal with cutting, trimming, fitting, and aligning polarized lenses into a frame they weren't designed for.
A couple examples include:
A quick search on Amazon yields a lot of options.
There are many options that you can do, but none of them are preferable.
Assuming your movie theater doesn't change the type of 3d between movies, you can get a pair of the glasses from the theater (or a friend). Take the arms off the frames. Drill a hole small enough to be inside the edges of the frame but large enough for some wire or string or fishing line to temporarily tie to your (vision correcting) glasses.
Might be worth getting a few disposable contact lenses - I use them for 3D cinema, and for sports.