VR Sickness ?
As for motion sickness, VR sickness occurs when your eyes and your inner ears get 2 different signals. When using a VR/AR system, you see virtual movement that your inner ears can't feel. That's how you start feeling uncomfortable.
Boarding VAR® can be built into any VR/AR device. It creates a horizontal plane into your peripheral field of view. It brings to your eyes an inertial reference similar to your inner ears. The sensorial conflict is then impossible : motion sickness is avoided !