Pilot Study of Transcorneal Electrical Stimulation Using OkuStim 2 System for Treating Visual Field Loss in Open-Angle Glaucoma Patients
Led by Okuvision GmbH · Updated on 2026-03-12
50
Participants Needed
1
Research Sites
N/A
Total Duration
AI-Summary
What this Trial Is About
Glaucoma is a progressive eye disease causing loss of retinal cells and visual field defects, with open-angle glaucoma being the most common type. This study aims to evaluate the safety and effectiveness of transcorneal electrical stimulation TES using the OkuStim 2 System for treating visual field loss in patients with primary open-angle glaucoma, pseudoexfoliation glaucoma, pigment dispersion glaucoma, or normal tension glaucoma. The research is a randomized, double-masked, sham-controlled pilot study conducted at a single center.
Participants are randomly assigned to one of two groups a sham group receiving no actual electrical stimulation and a TES group receiving stimulation at a maximum tolerated current below the pain threshold. TES is applied to one eye once a week for 30 minutes over an 18-month period. All patients continue their usual pressure-lowering eye drops to ensure safety during the treatment.
Throughout the study, participants undergo regular visual field tests, eye pressure measurements, imaging scans, and questionnaires to monitor changes in vision and eye health. Researchers compare the effects of TES with the sham treatment by examining differences in visual field outcomes after 18 months. Safety and adherence to the therapy are closely monitored, with the total participation lasting 18 months for each patient.
CONDITIONS
Brief Title
Transcorneal Electrical Stimulation for the Treatment of Visual Field Defects in Patients With Open-Angle Glaucoma
Research Team
K
Katrin Lorenz, Prof.
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Interdisciplinary Center for Clinical Trials, University Medical Center Mainz
Collaborating Sponsor
Who Can Participate
Age: 40Years +
All Genders
Eligibility Criteria
You may qualify if you...
Willingness to participate with signed informed consent before screening
Age 40 years or older
Diagnosis of primary open-angle glaucoma, pseudoexfoliation glaucoma, pigment dispersion glaucoma, or normal tension glaucoma in the study eye
Progression of visual field loss of at least 1.5 dB per year in the study eye
Mean defect in the study eye between 6 and 12 dB (Octopus) or between -6 and -12 dB (Humphrey) in screening exams
Visual acuity of 0.2 decimal (0.7 logMAR) or better in the study eye
Ability to perform home stimulation after training
Ability to understand study scope and give consent
If both eyes qualify, selection of study eye based on visual field and acuity criteria
Negative pregnancy test for women of childbearing potential
Women of childbearing potential must use effective contraception or abstain throughout treatment
You will not qualify if you...
Neovascularization in the study eye
Past arterial or venous occlusions in the study eye
Intraocular surgery within 3 months before screening in the study eye
Acute intraocular inflammation in any eye
Diabetic retinopathy in the study eye
Retinal detachment in the study eye
Dry or exudative age-related macular degeneration affecting the study eye
Macular edema of any origin in the study eye
Other relevant retinal diseases in the study eye
Corneal degeneration limiting vision in the study eye
Diseases other than glaucoma affecting central 30° visual field in the study eye
Planned cataract or other eye surgery during the study in the study eye (except laser trabeculoplasty)
Active implants
Difficult to control general illnesses that could interfere with study routines
Poor general condition per investigator
Mental illness or dementia reducing understanding of study procedures
Participation in another interventional study or recent interventions within 30 days
Breastfeeding women
Inability to give consent
Previous enrollment in this TES study
Allergies or hypersensitivity to silver preventing use of OkuStim 2 System
Your Study Journey
Screening
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Treatment
Duration - 18 months
Participants receive transcorneal electrical stimulation (TES) or sham treatment once a week for 30 minutes in the study eye to slow the progression of visual field defects.
Weekly visits for TES or sham stimulation
How is the study designed?
Study Type
INTERVENTIONAL
Masking
TRIPLE
Allocation
RANDOMIZED
Model
PARALLEL
Primary Purpose
TREATMENT
Number of Arms
2
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Published Research Related To This Trial
Transcorneal electrical stimulation for the treatment of visual field defects in patients with open-angle glaucoma: a monocentric, randomised, double-masked, sham-controlled pilot study: the TES-GPS study protocol.
Katrin Lorenz, Alexander Schuster, Helena Maria Michel...