Computer-based training for the treatment of partial blindness

Area of Science:

• Neuroscience
• Ophthalmology
• Rehabilitation Medicine

Background:

• Partial blindness following brain injury has historically been considered untreatable.
• Visual-field defects significantly impact patient quality of life and independence.

Purpose of the Study:

• To evaluate the efficacy of computer-based visual restitution training (VRT) for patients with visual-field defects.
• To determine if VRT can restore visual function in patients with optic nerve or post-chiasmatic brain injuries.

Main Methods:

• Two independent clinical trials were conducted involving patients with optic nerve (n=19) and post-chiasmatic brain injury (n=19).
• Patients underwent computer-based visual restitution training (VRT) or a placebo training regimen.
• Visual stimuli detection, visual-field size, and visual acuity were measured as primary outcomes.

Main Results:

• VRT significantly improved visual stimulus detection by 29.4% in post-chiasma patients and 73.6% in optic nerve patients.
• Objective measures confirmed visual-field expansion (4.9–5.8 degrees) and improved acuity in optic nerve patients.
• Ninety-five percent of VRT-treated patients showed improvement, with 72.2% reporting subjective visual gains; placebo group showed no comparable results.

Conclusions:

• Computer-based visual restitution training (VRT) is an effective therapy for improving vision in patients with partial blindness due to visual-field defects.
• VRT offers a novel, cost-effective treatment option for partial blindness resulting from optic nerve or post-chiasmatic brain injury.