Transorbital alternating current stimulation, or tACS, is designed to stimulate all the retina’s nerve cells to speed up vision restoration. New clinical findings indicate that even many years after an injury, tACS can restore visual functions. This is based on more than 15 years of research in professor Sabel´s laboratory at the Otto-von-Guericke University of Magdeburg in Germany involving persons with optic nerve damage or glaucoma. tACS requires no surgery or drugs. Nor is it painful. And it has no risks.
The treatment lasts thirty to fifty minutes daily for ten days. During a treatment session, you just sit down with your eyes closed. a brain pacemaker passes currents through the electrodes which then stimulate all cells in the retina to fire rapidly. But don’t worry. The current is below 0.0005 amperes—smaller than the signals of a heart pacemaker. As the current passes through your skin, you might feel a tingling on the skin.
The currents are transmitted at particular frequencies —forcing nerve cells to fire impulses in the retina onward to the brain, where brain waves then change their patterns. With tACS, the entire retina is stimulated very rapidly. It makes you feel a little bit like you’re in a disco with flickering lights because of some pulsating visual sensations you might notice, triggered by the current’s retinal stimulation. These visual sensations are called phosphenes. They are all good signs that the nerve cells are being properly stimulated.
If you would like to know more, you could watch the following video about tACS treatment: www.youtube.com/watch?v=g8p3mWsLvAI.
But beware, not everyone can receive alternating current stimulation. It’s off-limits to anyone with epilepsy. It may not improve vision in some people, usually less than 25 percent. Nevertheless, it does help the majority of patients in a noticeable way and for some (about 30 percent) it helps massively.