Transcorneal Electrical Stimulation - Multicenter Safety Study

Inclusion Criteria: * patients with retinitis pigmentosa (rod-cone dystrophy) after prescription of electrical stimulation by an ophthalmologist * adult patients who are capable of giving consent, * Visual acuity ≥ 0.02 * because the electrode is to be positioned on the eye at home, the patient or his family members should have sufficient fine motor skills (assessment by the study physician) * the patient must be capable of giving consent and a medical assessment that he/she is able to participate in the whole study according to the protocol Exclusion Criteria: * diabetic retinopathy * neovascularisation of any origin * after arterial or venous occlusion * after retinal detachment * silicone oil tamponade * dry or exudative age-related macular degeneration * macular edema * all forms of glaucoma * any form of corneal degeneration that reduces visual acuity * systemic diseases that are difficult to control or manage, that could endanger the normal study schedule * patients in a permanently poor general condition, which could hinder the regular attendance at control examinations in the clinic * forms of mental illness related to the bipolar affective and schizoid-affective disorders, and all forms of dementia * simultaneous participation in another interventional study or history of interventions whose effect may still persist