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'''Motion Sickness''' or '''Simulator Sickness''' is the feeling of dizziness, headache, nausea, vomiting and other discomforts when using a [[VR]] or [[AR]] device. In [[virtual reality]], Motion Sickness is caused by the discrepancies between the motion perceived from the screen of [[HMD]] and the actual motion of the user's head and body. In other words motion sickness from VR is developed when what our eyes see does not match how our heads move. Even minute minute discrepancies discrepancy can cause these unpleasant sensations. Motion Sickness is one of the major problems to the wide adoption of [[Virtual Reality]]. As hardware and software improve, [[VR Devices]] hope to reduce and eventually eliminate Motion Sickness.