A blind man can see again after being given a stem cell transplant.
Mike May, of California, had been blind for 40 years since an accident at the age of three where he lost one eye and was blinded in the other.During that time he had some ability to perceive light, but could not make out form or contrast.
He said he had no visual memories from his early childhood
The operation transplanted corneal and limbal stem cells into his right eye.
Interestingly, his brain has had trouble processing the images, though he is doing better with time. (Via Samizdata).