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Recently, great progress has been made in virtual reality(VR) research andapplication. However, virtual reality faces a big problem since its appearance,i.e. discomfort (nausea, stomach awareness, etc). Discomfort can be relieved byincreasing hardware (sensor, cpu and display) speed. But this will increasecost. This paper gives another low cost solution. The phenomenon ofcybersickness is explained with the control theory: discomfort arises iffeedback scene differs from expectation, so it can be relieved by disturbingfeedback loop in human brain. A hardware platform is build to test thisexplanation. The VR display on a Samsung S6 is blurred while head movement isdetected. The effect is evaluated by comparing responses to the SimulatedSickness Questionnaire (SSQ) between a control and experimental condition.Experimental results show that the new method can ease discomfort remarkablywith little extra cost. As a result, VR may be used more widely in teaching(like foreign language, medicine). It's also reasonable to expect likewisemerits in other VR applications.

Some Experimental Results of Relieving Discomfort in Virtual Reality by Disturbing Feedback Loop in Human Brain