Blind eyes just learned to see again — with light

Ten people who had lost nearly all their vision to an inherited eye disease were given a single injection into one eye that rewired surviving nerve cells to react to light. Then they put on special goggles that translate the world around them into pulses of light. Seven of the ten became more sensitive to light — and six improved enough to tell when an object was there, point to where it was, and reach for it accurately. The technique, called optogenetics, works by installing light-sensitive switches — borrowed from algae — into living cells, and its pioneers just won the 2026 Nobel Prize in Medicine. It is still early: ten people is a tiny trial, one side effect cleared up within minutes of the injection, and larger studies must follow. But the message is extraordinary — even at a very advanced stage of blindness, the brain can still learn to see.