Phosphenes may be the key to one day helping blind people to see. Phosphenes are what make a blind person see flashes of light without any visual input and what cause flashes of light when you rub your eyes.
By implanting an electrode array in the visual cortex of a blind woman’s brain, scientists were able to stimulate the electrodes to provide limited vision. After months of testing, the woman was eventually able to identify letters through stimulation of the electrodes.
Eventually, this could lead to a degree of functional vision for blind people; though due to the complexity of the brain, progress is slow.
Learn more about this revolutionary study at https://www.medicalnewstoday.com/articles/scientists-create-brain-implant-that-helped-blind-woman-see-letters