J Korean Ophthalmol Soc > Volume 61(2); 2020 > Article
Journal of the Korean Ophthalmological Society 2020;61(2):125-137.
DOI: https://doi.org/10.3341/jkos.2020.61.2.125    Published online February 15, 2020.
Relationship between Ocular Fatigue and Use of a Virtual Reality Device.
Sang Hyeok Lee, Martha Kim, Hyosun Kim, Choul Yong Park
1Department of Ophthalmology, Dongguk University Ilsan Hospital, Goyang, Korea. oph0112@gmail.com
2Sensory Organ Research Center, Dongguk University, Goyang, Korea.
3Display R&D Center, Samsung Display Co., Ltd, Yongin, Korea.
가상현실기기 사용이 눈피로에 미치는 영향 평가 연구
이상혁1 · 김마르다1,2 · 김효선3 · 박철용1,2
동국대학교 일산병원 안과1, 동국대학교 감각기관연구소2, 삼성디스플레이주식회사 디스플레이연구소3
Correspondence:  Choul Yong Park,
Email: oph0112@gmail.com
Received: 16 August 2019   • Revised: 19 September 2019   • Accepted: 22 January 2020
To investigate ocular fatigue after the use of a head-mounted display (HMD)-type virtual reality device. METHODS: Healthy adult volunteers were examined for ocular fatigue before and after watching videos for 10 min with an HMD-type virtual reality device. Subjective ocular fatigue was measured using a questionnaire. Objective fatigue was measured using the critical flicker fusion frequency (CFF), high frequency component of accommodative microfluctuation, and accommodation amplitude. The accommodation amplitude was measured using the push-up method and the dynamic measurement mode of the autorefractometer. Changes in the spherical equivalent were also measured. RESULTS: The questionnaire-based subjective ocular fatigue increased (p = 0.020) after use of the HMD device. In the dominant eye, the high frequency component of accommodative microfluctuation increased (p < 0.05). The accommodation amplitude using the push-up method was decreased in the nondominant eye (p = 0.007), and temporary myopia was observed (p < 0.05). However, there was no increase in ocular fatigue in the CFF or the accommodation amplitude using the dynamic measurement mode, which showed no significant difference before and after using the HMD device (p > 0.05). CONCLUSIONS: A subjective test and some objective tests suggested that use of the HMD-type virtual reality display increased ocular fatigue. However, no increase in ocular fatigue was measured using CFF nor in the accommodation amplitude using the dynamic measurement mode which was a limitation of the study. More studies with the aim to alleviate ocular fatigue after using HMD-type virtual reality devices are therefore needed.
Key Words: Asthenopia;Head mounted display;Virtual reality

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