Quote: As the movie-makers still played with ****ming and focussing, my visual cortex rebelled at first as this puts constraints on picking out your own focus as you would naturally do in threedimensional environments, and "forcibly" getting your eyes ripped away from what you were just watching was a bit disconcerting for me at first and made for a bit of "motion sickness"... I had to learn to let myself be led around by the camera, which took me some half an hour...
I had a very similar experience and have spoken to other friends, some of whom also made similar comments.
The first time I saw Avatar 3D, after about 30 mins or so I had a weird sensation of unease and a mild headache, so I tootk the glasses off for a minute or two and the sensation went away and I was able to watch the rest of the movie in 3D with no trouble. The second time I saw it, I had no trouble either. I was wondering if the fact that you still get some peripheral normal vision from the corners of the glasses might somehow.
I don't normally wear glasses, if that could be anything to do with it.