Why can't I see 3-d Movies (in 3-d)?

I recently took a trip to Disneyland. They have all kinds of 3-d movies there (similar kind of thing to the new popular 3-d movies you get in theaters). Prior to this trip, I'd noticed that I wasn't able to see the 'at home' 3-d movies that you can get.

I just figured that the 'at-home' version wasn't as good as what you'd get in the theaters. I've never actually seen an 'in the movie theater' version.

Anyways, on this trip, I went in to about 5 or 6 different '3d' movies, and it was always the same, with multiple sets of glasses.

It was like I was getting a 'bleed through' effect on the opposite channel (didn't look much different with/without the glasses on).

Every so often, it would 'pop' in to focus, and I could see everything the way it was supposed to be, but then it would go again, and I wouldn't be able to see it anymore. It helped it I kind of turned my head to one side.

I know I *used* to be able to see 3-d movies (like 14 years ago when I first went to one), but I can't any more.

I know that the glasses at the disney movies are polarizers at 90 degrees to each other (so presumably the left and right video channels are projected through a similarly oriented polarizer, and the glasses block out what you shouldn't see with that eye).

It makes me wonder if their might be something a little weird going on with my eyes (I was thinking an increased directional orientation in some of the layers of the eye might do it...)

Thoughts?