[Transcorneal electrostimulation in retinitis pigmentosa : Protocol of a multicentric prospective, randomized, controlled and double-masked trial on behalf of the Joint Federal Committee (G-BA pilot regulation)].

The focus of this large multicenter trial commissioned by the Joint Federal Committee (Gemeinsamer Bundesausschuss, G‑BA) is to determine a benefit of transcorneal electrical stimulation for retinitis pigmentosa (RP) patients. The main criterion for benefit is the kinetic visual field and whether the deterioration progresses more slowly in the study eyes compared to the sham-stimulated fellow eyes over a treatment period of 3 years.