Oculus Developer Site Wrote:Apparent dissonance between the senses can lead the body to believe that something is wrong. One possibility for this is that we have been poisoned, therefore the brain causes feelings of nausea, and when extreme this leads to vomiting. Most commonly experienced when on moving vehicles, such as boats or the top floor of buses, this is called motion sickness. Normally this occurs when one set of senses (e.g. sight) is taking input from one reference frame (e.g. the inside of a vehicle, which appears stationary), whilst another (e.g. the inner ear - an inertial reference) is referring to another frame (e.g. if the vehicle is, in fact, moving/rocking).
Within VR these issues are inverted - from an inertial perspective you are relatively stationary, however from a visual perspective the body is moving. Nausea from such disparity could prove to be a major barrier to adoption of VR technologies. Some guidelines have been identified by trial and error, to minimise this nausea, and further investigations are needed. This page summarises both