Electrical eye stimulation can cure depression.

Hong Kong scientists have tested corneal electrical stimulation on mice and found that the procedure alleviates symptoms of depression and slows the progression of Alzheimer's disease. Applying a weak current to the eye is called transcornial stimulation. Initially, the method was developed for the treatment of the eyes. But it turned out that electric current applied to the cornea can activate the hippocampus. This is the area of the brain involved in learning and memory.