It aint over yet... it's like the microwave nuked food debate...
Another example: Scientists always quarrels about what food to eat and not. Amazing what little they know about the human body...
I'm more than convinced myself that 3d doesn't harm people but it takes some time to get used to stereoscopy. Since i brought my passive stereorig to quite few birthdays parties etc i have some experience how people react to it.
I'm certain that small children (below 6,7 years) don't benefit from 3d. They simply take of the glasses and play with doubled image. This matches reports that the stereopsis sense isn't developed during young years. I don't think it's harmful playing with glasses anyway (maybe even stimulating but i leave that open...) but i made two pairs of monoglasses to get a proper, yet monoexperience for them. Some people have problem seeing the stereoscopic effect at all and usually this is about using too high stereosettings. Going down to almost zero and gradually increase gets all folks aboard. After two hours of gaming everybody wants higher depth than me...
![Cool 8-)](./images/smilies/icon_cool.gif)
This is practically a problem with 3d-movies. First the big screen disable usage of high settings and moderate depth also needs to be used to "get all aboard". Until we're actually able to change the depth in movies i guess we have to live with low depth in movies.