How harmful are 3D Glasses?

Personally, 3D makes me sick... But out of full honesty, I can't really watch 3D. Unfortunately my contacts use mono-vision. One eye focuses on long distance where the other focuses on short distance. 3D glasses require your eyes to work together. Something mine are terrible at... Regardless, if I even try it never works and I end up with a headache.

I think it depends on the person. The 3D glasses I use never bother me.

I checked out the Stereogram page or whatever it's called on Wikipedia, and the wall-sight stuff blows my mind.

In all honesty though, 3D is for like a few seconds of viewing. Not hour long movies. They hurt my eyes and give me headaches. But this wall-sight stuff is really the shiz.

http://en.wikipedia.org/wiki/Autostereogram is the page.

I don't like the colored 3d glasses. The polarized or shutter glasses are a lot nicer on your eyes.

I can only handle so much 3D. To me, a movie doesn't have to be 3D to reel me in to the experience. For example, if I saw a movie like The Departed in 3D, I'd be mad. Simply because the 3D and glasses themselves would make me focus more on that than the plot. 3D is fine for goofy movies or amusement parks but not EVERY movie that comes to theaters!

There are combination between glasses and how the film was made. So far the industry is trying to standardize how to produce 3D Video. If you want to know the techniques, check this link from Sony. This is very explanatory tutorial. http://www.youtube.com/watch?v=a2KT1I_3YU4&feature=related Anyway the monitor 3d without glasses are coming...definitively 3D Glasses are very uncomfortable way to see 3D movies.