Simulator Induced Sickness with HMDs like the Oculus Rift in General Discussion Forum Posted January 5, 2016 DrJ Darkfold wrote: For several years I chaired a Tri-Service/NASA committee studying the causes and effects of simulator induced sickness (SIS) with the use of high-resolution head-mounted displays (HMD). These phenomena, which usually include nausea and some dizziness are mainly caused by a conflict between the visual system (telling you are moving) and the vestibular system (which is convinced that you are not moving). Increasing the instantaneous field-of-view, resolution, sharpness of image, update rate – all these engineering improvements have no effect on the SIS. SIS is more prevalent in users over 40 and also in females. What normally happens is that with repeated usage the incidence of SIS will decline, so the recommended approach is to limit the first several sessions with a HMD to short intervals with long breaks in between while the adaptation is taking place. Roughly 5-10% of users will not benefit by adaptation and will continue to experience SIS. Happy to answer any questions. I haven't tried any of the various Oculus or other HMD's, nor do I have any immediate plans to do so. I am strictly a casual observer here. I just think what you have to impart would be better done by linking studies/papers/articles that talk about the subject. You did say there were NASA studies and while I'm sure some were military related and classified, I find it hard to believe there aren't some available to the public. People who post to forums can claim to be anything or anyone at all. Anyone who spends much time in forums gets a bit wary of people who suggest they have out of the ordinary training/occupational experience/knowledge/etc. I am not suggesting you're a fraud at all, in fact truth to tell I'd be inclined to believe all you said (in spite of the fact I have absolutely no basis or reason for doing so). I'm just suggesting that for some things, and this is such, it's better to say "I know something about this, and there is documented intormation about it here", and then post one or more links. A lot of people won't click links but people who actually want to learn about the subject you're discussing will probably know how to check the link to see if it's reasonably safe.