Scientist Karl Wahlin is hoping to use the tiny retinas he's developed from stem cells to find a cure for blindness. Wahlin has teamed up with UC San Diego Stem Cell Program Director Alysson Muotri, who is using a similar technique to study the brain. Together, they hope to understand how the brain and the eye influence one another's development. Series: "Stem Cell Channel" [Health and Medicine] [Science] [Show ID: 34273]