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Research and Clinical Results

Vision Restoration Therapy (VRT) – Research Articles

Vision Restoration Therapy has been the subject of many clinical studies that have shown it to be effective in about 70 percent of patients who have suffered stroke- or brain injury–related vision loss. A selection of these studies include:

  • Computer-Based Training for the Treatment of Partial Blindness
  • VRT after Brain Damage: Subjective Improvements
  • Computer-Based Training of Stimulus Detection Improves Color and Simple Pattern Recognition in the Defective Field of Hemianopic Subjects
  • Attentional Cueing Improves Vision Restoration Therapy in Patients with Visual Field Defects
Computer-Based Training for the Treatment of Partial Blindness

The results of two independent clinical trials show that, contrary to conventional wisdom, it is possible to treat partial blindness after a brain injury. Computer-based vision training is both an effective and cost-efficient way to improve vision in patients with visual field defects.

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VRT after Brain Damage: Subjective Improvements

A retrospective study was carried out with 69 patients who had been interviewed after six months of VRT. After the treatment, patient testimonials were gathered, analyzed, and correlated with demographic status and pre- and post-VRT changes as measured by perimetric testing. It was concluded that VRT significantly increased detection ability, and most patients reported improvements in everyday activities.

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Computer-Based Training of Stimulus Detection Improves Color and Simple Pattern Recognition in the Defective Field of Hemianopic Subjects

To determine if improvement of vision may be achieved even after the time period in which spontaneous recovery occurs, two prospective, randomized, placebo-controlled clinical trials were conducted with 38 patients who had sustained injuries affecting their visual system.

Most patients in the placebo group experienced no change in visual field size, while the experimental group displayed a reliable enlargement of their visual field. This was indicated by a significant shift of the edge of vision and by improvements in the patients’ ability to detect small visual stimuli.

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Attentional Cueing Improves Vision Restoration Therapy in Patients with Visual Field Defects

In this study, researchers identified the processes and results of NovaVision VRT™ Vision Restoration Therapy™ by measuring visual field size in patients both in a control group and in an experimental group. The purpose of the research was to examine whether directing attention to areas of residual vision using visuospatial cues also increases long-term neuronal plasticity, thereby enhancing permanent therapy outcomes.

In areas where cues were used, restoration of vision was significantly greater than during VRT without cueing. Cued patients showed a pronounced widening of the visual field into blind areas compared to the control group. Additionally, the areas where cues were used among members of the experimental group showed marked improvement in relation to the uncued regions of the visual field in the same patients.

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