John Kempen, MD, PhD (IMAGE) University of Pittsburgh Caption John Kempen, M.D., Ph.D., senior scientist and director of epidemiology for ophthalmology at Mass Eye and Ear and professor of ophthalmology at Harvard Medical School Credit Mass Eye and Ear Usage Restrictions For use only in reporting on this study License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.