Clinical efficacy of low vision aid using virtual reality device

Abstract

Purpose: To evaluate the clinical usefulness of a low vision aid using a virtual reality device (LVA-VR) in patients with low vision. Methods: Forty low vision patients were enrolled in this prospective study. All subjects participated in a two-session LVA-VR training course. The binocular best-corrected distance, intermediate, and near visual acuities (BCDVA, BCIVA, and BCNVA, respectively) were measured, along with contrast sensitivity and reading performance, at baseline and after 2 weeks of LVA-VR use. All subjects also provided a self-rated functional score (SFS) and completed a satisfaction questionnaire following the study. Results: Thirty-nine subjects (mean age, 54.6 ± 22.7 years) completed the study. Significant improvements in BCDVA, BCIVA, BCNVA, and contrast sensitivity were observed after 2 weeks of LVA-VR use (p < 0.001). Reading accuracy also improved significantly (p = 0.027); however, the reading speed did not change. Subject functionality improved, as indicated by the increase in the SFS (11.8 ± 4.5 vs. 19.6 ± 5.3) (p < 0.001). Most patients were satisfied with their visual function improvement and found LVA-VR to be useful in their daily activities. No device-related adverse events were observed or indicated. Conclusions: This study suggests that LVA-VR is beneficial for visual rehabilitation. Future technological advances are expected to improve LVA-VR performance and acceptability further for a better quality of life in low vision patients.