I use to run an IMAX projector. screen was 7 stories tall and 88 ft wide.
sit in the middle of the house, your periphial vision is filled. Peeps would barf over airplane rolls, rollercoaster shots, it was sick.
1 purpose of VR is to fill periphial vision, no cures, you adapt. I would suggest that devices that pitch your head, double muff for ie, might be constricting blood flow to brain. Double muff headsets give me a headache cuz of the squeeze......................