Assessing Saccadic Eye Movements With Head-Mounted Display Virtual Reality Technology

被引:51
作者
Imaoka, Yu [1 ]
Flury, Andri [1 ]
de Bruin, Eling D. [1 ,2 ]
机构
[1] Swiss Fed Inst Technol, Motor Control & Learning Lab, Inst Human Movement Sci & Sport, Dept Hlth Sci & Technol, Zurich, Switzerland
[2] Karolinska Inst, Div Physiotherapy, Dept Neurobiol Care Sci & Soc, Stockholm, Sweden
关键词
saccadic eye movement; virtual reality; head mounted display (HMD); dementia; neurological disorder; ageing; pupillary response; saccade; NEUROLOGICAL DISORDERS; TELL US; PUPILLOMETRY;
D O I
10.3389/fpsyt.2020.572938
中图分类号
R749 [精神病学];
学科分类号
100205 ;
摘要
As our society is ageing globally, neurodegenerative disorders are becoming a relevant issue. Assessment of saccadic eye movement could provide objective values to help to understand the symptoms of disorders. HTC Corporation launched a new virtual reality (VR) headset, VIVE Pro Eye, implementing an infrared-based eye tracking technique together with VR technology. The purpose of this study is to evaluate whether the device can be used as an assessment tool of saccadic eye movement and to investigate the technical features of eye tracking. We developed a measurement system of saccadic eye movement with a simple VR environment on Unity VR design platform, following an internationally proposed standard saccade measurement protocol. We then measured the saccadic eye movement of seven healthy young adults to analyze the oculo-metrics of latency, peak velocity, and error rate of pro- and anti-saccade tasks: 120 trials in each task. We calculated these parameters based on the saccade detection algorithm that we have developed following previous studies. Consequently, our results revealed latency of 220.40 +/- 43.16 ms, peak velocity of 357.90 +/- 111.99 degrees/s, and error rate of 0.24 +/- 0.41% for the pro-saccade task, and latency of 343.35 +/- 76.42 ms, peak velocity of 318.79 +/- 116.69 degrees/s, and error rate of 0.66 +/- 0.76% for the anti-saccade task. In addition, we observed pupil diameter of 4.30 +/- 1.15 mm (left eye) and 4.29 +/- 1.08 mm (right eye) for the pro-saccade task, and of 4.21 +/- 1.04 mm (left eye) and 4.22 +/- 0.97 mm (right eye) for the anti-saccade task. Comparing between the descriptive statistics of previous studies and our results suggests that VIVE Pro Eye can function as an assessment tool of saccadic eye movement since our results are in the range of or close to the results of previous studies. Nonetheless, we found technical limitations especially about time-related measurement parameters. Further improvements in software and hardware of the device and measurement protocol, and more measurements with diverse age-groups and people with different health conditions are warranted to enhance the whole assessment system of saccadic eye movement.
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页数:19
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