Scientists restore vision to blind mice.
There are three blind men who have an inherited eye disorder that had destroyed the light-sensing cells of their retinas many years ago. Now one of the blind men can walk around at night navigating by streetlight and headlights. Another can read his own name. And the third mean has been able to see his fiancée’s smile for the very first time. All of this has been made possible by the retinal implants they have been fitted with. The implants took over from the broken cells. They sense incoming light by converting it into electrical impulses delivered to the brain. They aren’t close to having 20/20 vision, but they have restored sight to people who have lived without it for years.