VR sickness ?
As for motion sickness, VR sickness occurs when your eyes and your inner ears get mismatching signals. The virtual moves on the screen diverge from the real moves of your head. That's how you start feeling queasy, like 45% of the user's.
Boarding VAR® is an add-on device, adapted to any VR headset. It brings to your peripheral vision inertial references that match your inner ear's perception. The sensorial conflict is then impossible : motion sickness is avoided !