"There's a guy walking around who was blind, but now can see," said Gary Rabin, CEO of Advanced Cell Technology, the company which developed an experimental stem cell treatment that has restored the sight of a blind patient. The man's vision improved from 20/400 (basically blind) to 20/40 (pretty much not). "With that sort of vision, you can have a driver's licence," Rabin said. Although trials of the treatment had already been moderately successful in patients suffering from dry age-related macular degeneration and Stargardt's macular dystrophy, this has been by far the most dramatic result. [Source]