Macular Edema (IMAGE) NIH/National Eye Institute Caption Optical coherence tomography (OCT) image showing macular edema. Credit Image courtesy of Nisha Acharya, M.D., University of California San Francisco. Usage Restrictions Use with credit. 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.