Yet another 3D glasses issue: they’re not clean (even in plastic) http://yhoo.it/b5ZGGr No good housekeeping seal of approval!
I should also point out that most surfaces in a cinema will have similar levels of “germs” (ie bacteria and viruses if we want to be accurate) but it’s the yuk factor of having them on your face for two hours that I’d simply rather not think about!
Bottom line: There’s probably nothing to be alarmed about, but if you’re really concerned about the cleanliness of 3-D glasses, you’ll probably need to clean them yourself with a disinfectant wipe before you put them on. Failing that, there are plenty of perfectly watchable 2-D movies that require no special eyewear still making the rounds.