Man with restored sight provides new insight into how vision develops

Fifteen years after California entrepreneur and downhill ski champion Mike May underwent a pioneering stem cell procedure, researchers investigate how functional his vision is. "With sight-restoration procedures becoming more developed, we're going to see more and more cases where people are blind for long periods of time and then get their sight back," said the study's senior author. "But we know very little about what happens in their brains during that period. That is going to be one of the f...