가상현실 영상 시청이 안구 건조와 시력의 질에 미치는 영향에 대한 연구

Purpose: The aim of the present study was to compare the effects of watching movies with two-dimensional (2D) display and virtual reality (VR) devices on ocular dryness, optical quality, subjective fatigue, and dryness. Methods: We enrolled 37 adults with binocular corrected visual acuity ≥0.8 who did not have eye disease or visual dysfunction. We measured changes in noninvasive break-up time (NIBUT), traumatic macular hole (TMH), and corneal higher-order aberration (HOA) before and after watching the same 40-min movies using 2D display and VR devices. In addition, subjective changes in fatigue and dryness were measured using the VR sickness questionnaire (VRSQ) and ocular surface disease index (OSDI) questionnaire. Results: NIBUT after watching movies had increased by 4.57±4.73 s for VR devices and decreased by –6.3±2.98 s for 2D display compared to before watching movies. The difference in TMH was 0.03±0.05 mm for VR devices and –0.02±0.03 mm for 2D display. In the pupils of 4-mm size, HOA decreased by – 0.04±0.18 μm for VR devices and increased by 0.1±0.12 μm for 2D display. In the pupils of 6 mm size, HOA decreased by –0.05±0.28 μm for VR devices and increased by 0.15±0.17 μm for 2D display. NIBUT, TMH, and corneal HOA results and trends differed significantly between VR devices and 2D display (p<0.05). The VRSQ score differed by 9.46±4.54 for VR devices and 7.32±3.39 for 2D display (p=0.009). The OSDI score differed by 12.3±7.36 in VR devices and 9.59±5.93 in 2D display (p=0.062). Conclusions: In this study, NIBUT, TMH and corneal HOA were stabilized, while subjective symptoms were affected when watching movies using VR devices. As VR device use increases, visual acuity and dry eyes should be continuously researched.