There's about eight percent to 10 percent of the population that can't see the 3D effect due to a lazy eye muscle; if the person is color blind, says Bob Seidel, CBS Advanced Technology and Engineering VP.
'There is another percentage that can develop motion sickness or other motion-related issues, and then there are some that develop headaches. What percentage still requires further research, but it could be as high as 20 percent," says Seidel.
Unfortunately, I am among the percentage that will never buy a 3D set for precisely that reason.: it causes motion sickness when I watch.