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Re:MS Flight Simulator 2020 vs. Real life by aidenn0 on Sunday May 10, 2020 @08:56PM (#23137819)
There is a small fraction (iirc 10-20%) of the population for whom a disparity between accommodation (focus) and binocular vision (what 3d movies do) causes headaches and nausea.

This is why most 3d movies have very little happen in the virtual space between you and the screen. Since more than about 7 meters away is basically all the same final distance, it's fine.

That being said, it's the stuff flying at you that makes 3d seem worth the extra money, so they try to balance it. Some people will still get very ill even with the small amount that movies do.

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