Aren't you concerned that prolonged looking at the movie screen in the moving (and thus vibrating) vehicle will be bad for the kid's eyesight? I personally fee

Aren't you concerned that prolonged looking at the movie screen in the moving (and thus vibrating) vehicle will be bad for the kid's eyesight? I personally feel eye strain if I try to watch or read something on my iPhone for too long in a moving car (not so bad on a bus).