eye strain
Report: Japanese 3DS owners turning off 3D because of tired eyes
Why? Eye strain. Specifically, stereoscopic 3D fatigues the eyes more than normal, says Bashcraft of Kotaku: The anecdotal conclusion I’ve reached is that [eye strain] is the result of having two screens. The top screen can display the 3D effect, while the touch screen is in 2D… This focusing, re-focusing and then focusing again on each screen could be the cause of [eye strain] I̵...