Dr. David S. Friedman on Diabetic Retinopathy

David S. Friedman, M.D., M.P.H., Ph.D. Alfred Sommer Professor at the Wilmer Eye Institute of Johns Hopkins University School of Medicine talks about Diabetic Retinopathy and the IAPB Diabetic Retinopathy Work Group with Ms. Kathy Spahn, Chief Executive of Helen Keller International. Brighton, September 2013.