Loss of the stem cells that constantly renew the surface of the cornea causes pain and, in some cases, blindness. Advances in transplantation and cell culture are helping to restore vision to even the most severely affected people.
A bone fracture that fails to heal after initial treatment can lead to prolonged disability. Regenerative therapies might help to restart the bone-healing process, getting the people affected back in action.
The spinal cord rarely repairs itself when damaged, but ways of encouraging nerves to regrow are on the horizon.