A Systematic Review and Meta-Analysis of Perceptual Learning and Video Game Training for Adults with Monocular Amblyopia.

INTRODUCTION

Amblyopia is a neurodevelopmental disorder characterized by a reduction in best-corrected visual acuity (BCVA). This meta-analysis aimed to analyze the effectiveness of perceptual learning and video game training for adults with amblyopia.

METHODS

Following Cochrane guidelines (PROSPERO CRD42024504502), we conducted a systematic search across multiple databases. Randomized controlled trials (RCTs) on adults with amblyopia receiving behavioral therapies were included. Data on interventions, sample size, and logMAR visual acuity were extracted and analyzed using Review Manager 5.4 and Stata 17.0.

RESULTS

A total of 6439 studies were identified, with 22 meeting the inclusion criteria after screening. The meta-analysis included 422 adult patients with amblyopia across these studies. Quality assessment revealed that 78% of studies had a low risk of bias. The analysis showed a statistically significant standardized mean difference (SMD) of -0.68 in the experimental group compared with controls, indicating an improvement in visual acuity (P < 0.05). Subgroup analyses indicated that perceptual learning and video game training also resulted in visual improvement (P < 0.05). In addition, the results indicated a significant improvement in visual acuity with dichoptic training or monocular training, reaching visual acuity improvement (P < 0.05).

CONCLUSIONS

These findings indicate that targeted visual training facilitates neural plasticity, reduces interocular suppression, and reinforces neural pathways associated with visual processing. While video game-based interventions represent a viable and engaging rehabilitation strategy, a combined approach may be most effective in enhancing monocular and binocular functions. Future research should focus on refining training protocols to enhance both monocular and binocular visual function more effectively.