Fig. (1) Top: Appearance of the transcutaneous electrical retinal stimulation therapy. Top: The skin electrodes are applied to patches on both eyelids and the microcurrent runs through them. The patient remains seated during the 20-minute treatment. Bottom: The schema of the transcutaneous electrical retinal stimulation therapy. The [L] indicates eyelid. The [E] indicates cutaneous contact electrode. *: The dotted lines show the electrical current which is regulated in a symmetric bidirectional way.