When the movie's over, and you take your glasses off, your brain is still ignoring all those depth perception cues. It'll come back to normal, eventually. Some people will snap right back. In others, it might take a few hours. This condition, known as 'binocular dysphoria', is the price you pay for cheating your brain into believing the illusion of 3D. Until someone invents some other form of 3D projection (many have tried, no one has really succeeded), binocular dysphoria will be part of the experience.This doesn't matter too much if you're going to see a movie in the theatre - though it could lead to a few prangs in the parking lot afterward - but it does matter hugely if it's something you'll be exposed to for hours a day, every day, via your television set. Your brain is likely to become so confused about depth cues that you'll be suffering from a persistent form of binocular dysphoria. That's what the testers told Sega, and that's why the Sega VR system - which had been announced with great fanfare - never made it to market.
Video games are one of the great distractions of youth. Children can play them for hours every day, and our testers realized that children - with their highly malleable nervous systems - could potentially suffer permanent damage from regular and extensive exposure to a system which created binocular dysphoria in its users.
Did not know that. That's scary.