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Purpose:To determine whether transcorneal electrical stimulation(TES) can improve the visual function of patients with nonarteritic ischemic optic neuropathy(NAION) or traumatic optic neuropathy(TON) .Methods:Eight consecutive patients at the Osaka University Hospital were studied.TES(600-800 μ A,20 Hz,30 min) was applied once each to three eyes with NAION and to five eyes with TON,using a contact lens-type stimulating electrode.The primary outcome measurement was the change in visual acuity at 1 to 3 months after TES.An improvement in visual acuity was defined as a change of ≥ 0.3 log(minimum angle of resolution) (logMAR) units.The side effects of TES were also investigated.Results:After TES application,the visual acuity improved in two patients with NAION and in four patients with TON.Visual acuity did not worsen in any of the eyes.Only a mild superficial punctuate keratopathy was observed in all eyes immediately after TES,and it healed by the next day.Conclusions:Visual acuity can be improved after TES without major complications in some patients with NAION or TON.These results suggest that TES should be considered as a new treatment for eyes with optic neuropathy.
Purpose: To determine whether transcorneal electrical stimulation (TES) can improve the visual function of patients with nonarteritic ischemic optic neuropathy (NAION) or traumatic optic neuropathy (TON). Methods: Eight consecutive patients at the Osaka University Hospital were studied. TES (600 -800 μA, 20 Hz, 30 min) was applied once each to three eyes with NAION and to five eyes with TON, using a contact lens-type stimulating electrode. The primary outcome measurement was the change in visual acuity at 1 to 3 months after TES.An improvement in visual acuity was defined as a change of ≥ 0.3 log (minimum angle of resolution) (logMAR) units. The side effects of TES were also investigated. Results: After TES application, the visual acuity improved in two patients with NAION and in four patients with TON. Visual acuity did not worsen in any of the eyes. On a mild superficial punctuate keratopathy was observed in all eyes immediately after TES, and it healed by the next day. Conclusions: Visual acuity ca n be improved after TES without major complications in some patients with NAION or TON. These results suggest that TES should be considered as a new treatment for eyes with optic neuropathy.