Transcorneal electrical stimulation (TES) is a therapy developed for use in patients with a variety of eye diseases. The procedure involves placing electrodes in the form of contact lenses upon the patient's corneas, with a reference electrode on the skin near each eye. A weak current is delivered through the electrodes, with the intent of stimulating the visual system and enhancing its activity.[ citation needed ]
As of 2022, the technique was still in the early stages of research in human patients. A review of literature published in 2020 estimated this therapy as "probably effective" in the treatment of retinitis pigmentosa, based on the evidence available at the time. [1]
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