Research On Visual Fatigue Evaluation In The Interactive Scene Of Head-mounted Virtual Reality Device

With the widespread popularity of virtual reality headsets,the way humans experience virtual environments is rapidly changing.Virtual reality equipment has been used in medicine,social life,industry and other fields.Eye fatigue is increased when using head-mounted displays embedded with near-eye displays.The imaging principle of virtual reality equipment determines that visual fatigue cannot be eliminated and can only be improved through various ways.Based on the purpose of exploring the degree of visual fatigue in the head-mounted virtual reality interactive scene,this thesis sets up three virtual reality devices for comparative experiments,explores the influence of the head-mounted virtual reality interactive scene on visual fatigue,and proposes measures to improve the visual fatigue to guide the development and use of virtual reality equipment in the future.This thesis designs experiments to explore.In the experiment,10 subjects were recruited,three groups of control experiments were set up,and seven visual fatigue evaluation indicators were measured,including heart rate,reaction speed,aiming speed,calculation accuracy,visual induction motion sickness level,subjective questionnaire results of visual terminal syndrome,and subjective fatigue scale results.Using the principal component analysis method,a comprehensive scoring method of visual fatigue in three experimental scenarios was constructed,the weight of evaluation indicators and the ranking of fatigue degree in different scenes were obtained,and measures to improve visual fatigue during the use of virtual reality equipment were proposed.The main findings are as follows:(1)The experimental results show that heart rate,visual induced motion sickness level questionnaire results,visual terminal syndrome subjective questionnaire results,reaction speed,and calculation accuracy are used as evaluation indicators,and virtual reality interactive scenes will bring visual fatigue.Taking the results of the visual induced motion sickness level questionnaire,the subjective questionnaire results of visual terminal syndrome,the subjective fatigue scale,and the aiming speed as the evaluation indicators,3D screen viewing will bring visual fatigue.Taking the subjective questionnaire results of visual terminal syndrome as the evaluation index,2D screen viewing will bring visual fatigue.(2)The principal component analysis method sorted the degree of visual fatigue in three experimental scenarios: virtual reality interactive scene> 3D screen viewing>2D screen viewing.The weights of the evaluation indicators were sorted as VDT results(22.25%)> heart rate(16.73%)> aiming speed(14.23%)> SPFS results(13.61%)> VIMSL(13.33%)> reaction speed(10.52%)> calculation accuracy(9.34%).The degree of visual fatigue is independent of gender.(3)Ways and measures to improve the visual fatigue generated during the use of virtual reality equipment are proposed.In this thesis,the causes of visual fatigue are analyzed,and the ways and measures to improve the virtual reality interaction scenarios with the most visual fatigue are proposed.The visual fatigue evaluation system caused by virtual reality devices proposed in this thesis is helpful for the early evaluation of human factors effect of virtual reality interaction design,and the research results are helpful to set a better and more comfortable experience duration and experience environment in the process of virtual reality device experience,and the related methods and results also have reference significance for the evaluation of visual fatigue in other virtual reality use scenarios.The thesis has 14 figures,64 tables,and 67 references.