Brain Stimulation May Improve Vision in Glaucoma

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Brain Stimulation May Improve Vision in Glaucoma
Brain Stimulation May Improve Vision in Glaucoma

HealthDay News — Electrical pulses to the brain may help restore vision in some partially blind patients, according to a study published in PLOS ONE.

For the study, investigators focused on 82 partially blind adult patients between 2010 and 2012. Thirty-three had glaucoma, while the rest had other types of optic nerve damage. A little more than half (45) the group was assigned to receive electrical stimulation therapy; the rest received a placebo treatment. Electrical stimulation sessions ranged from 25 minutes on the first day to 50 minutes a day by day 10.

The researchers found that 2 days after treatment ended, the electrical stimulation group saw a 24% improvement, on average, in the ability to perceive objects across their whole field of vision. This improvement was maintained 2 months out, on average. By comparison, the control group saw less than a 3% improvement, which dropped off to almost nothing after 2 months.

Some patients saw permanent improvements, while others lost their gains over time. What's more, a third of the electrical stimulation patients did not realize any treatment benefit at all, with no clear indications as to why, study author Bernhard Sabel, PhD, of the Otto-von-Guericke University of Magdeburg in Germany, told HealthDay. Still, the treatment was deemed to be safe, with mild side effects and no discomfort during the procedure, he said. Dr Sabel said the findings justify making electrical stimulation available to patients immediately, adding: "We do not need more research to show that it [is] a major step forward."

Reference

Gall C, Schmidt S, Schittkowski MP, et al. Alternating Current Stimulation for Vision Restoration after Optic Nerve Damage: A Randomized Clinical Trial. PLoS ONE. 2016;11(6):e0156134.

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