Photosensitive Seizure Warning and Other
CNN has an analysis: "Can 3-D movies, television make you sick?". In part, it says
In addition: As for long-term effects of watching 3-D television instead of regular television, no one knows for sure because it's too new. ...is concerned about serious consequences for children who watch 3-D television for long periods of time -- 'a continuous abnormal stimulus may possibly have long-term effects that are yet to be studied'...
So 3D TV watching can be hazardous to your health. Does it really? More research, please.