Mardad Rafat and Neil Lagali Discuss Pig Collagen Cornea Transplants

Scientists in a university in Sweden have restored sight for people who were previously registered blind or visually impaired by transplanting corneas made from pig collagen.

David Hogg spoke with Mardad Rafat and Neil Lagali from University of Linköping to find out more about the experiment, its results and what it means for the future.