Renee Ryals, Ph.D. (IMAGE) Oregon Health & Science University Caption Renee Ryals, Ph.D., is an assistant professor of ophthalmology in the Oregon Health & Science University (OHSU) School of Medicine and a researcher at the OHSU Casey Eye Institute. Credit Courtesy of Renee Ryals, Ph.D. Usage Restrictions Credit Renee Ryals, Ph.D., as the source of this image. 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.