Plain-English translation of NCT04846140 on ClinicalTrials.gov ↗ · Source last updated · Translation generated · How we translate trials
This study doesn't follow the usual testing phases — it may be an observational study or a different type of research.
This trial is testing whether a painless brain stimulation technique called transcranial electrical stimulation can help restore side vision that has been lost to glaucoma. The study will test three different types of stimulation—a-tDCS, tACS, and tRNS—to see which works best at improving peripheral (side) vision. Researchers will compare these active treatments to a sham (fake) stimulation to understand what's actually working.
Glaucoma damages side vision gradually, and current treatments mainly slow down further damage rather than restore lost vision. This trial is exploring whether gentle electrical stimulation of the visual part of the brain might help recover some of that lost peripheral vision.
You will attend 5 visits over several weeks. The first visit is a screening appointment to confirm you are eligible. At visits 2–5 (spaced at least 2 days apart), you will receive 20 minutes of brain stimulation while wearing small electrodes on your scalp—one at the back of your head and one on your cheek. You will try all four types of stimulation (three active types plus one fake) in random order, though neither you nor the researchers will know which is which. Before and after each session, your side vision and brain electrical activity will be tested to measure any changes.
AI-generated summary from trial data · Jun 18, 2026 · Not medical advice
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