VR-based vision training slows myopia progression in children

A new virtual reality-based vision training method may help slow the progression of myopia in children, according to a study published in JAMA Ophthalmology. The research suggests that digital defocus training can effectively regulate eye growth, offering a potential new tool for managing nearsightedness in youth.

The study, led by Jing Zhong et al., tracked 120 children between the ages of 6 and 12 over a six-month period. Participants in the training group utilized digital defocus vision training (DDVT) for 15 minutes per day in conjunction with single-vision spectacles. The results showed that the DDVT group experienced a significantly slower increase in axial length—the physical lengthening of the eye associated with myopia—measuring 0.15 mm compared to 0.25 mm in the control group.

Additionally, the researchers found that the DDVT group had a smaller change in spherical equivalent refraction, recording -0.23 D compared to -0.46 D in the control group. Crucially, the study reported that there were no adverse events related to the training.

The Mechanics of Defocus

Myopia is an escalating global health concern, frequently linked to an increase in "near-work" activities, such as reading and screen use, and a corresponding decrease in time spent outdoors. The biological driver of the condition is often the elongation of the eye's axial length.

Defocus refers to the way light focuses relative to the retina. By simulating specific defocus conditions through a VR headset, the DDVT method aims to stimulate the eye's natural growth regulation mechanisms. This approach attempts to signal the eye to slow its elongation, thereby stabilizing the child's vision.

Implications for Myopia Control

If these results are replicated in larger trials, VR-based training could provide a non-invasive and scalable alternative to current myopia control strategies. Currently, clinicians often rely on pharmacological interventions, such as atropine eye drops, or the prescription of specialized contact lenses and glasses.

Unlike pharmacological treatments, which can cause side effects like pupil dilation or light sensitivity, or specialized lenses, which require precise fitting and maintenance, a digital training regimen could be administered more flexibly. The lack of reported adverse events in the Zhong study suggests a favorable safety profile for this digital intervention.

Future Outlook

While the six-month data is promising, the long-term efficacy of digital defocus training remains to be seen. Future research will likely focus on whether the slowing of axial length growth persists over several years and whether the 15-minute daily dosage is optimal for all age groups within the pediatric population. For now, the study provides a proof-of-concept that immersive technology can be leveraged for therapeutic vision correction.