AMD Eye (IMAGE) University of Iowa Caption University of Iowa researchers report that a new drug holds promise for those with age-related macular degeneration (shown in this image by the darkened splotch in the center), which is the leading cause of vision loss and blindness in older Americans. Credit Vinit Mahajan, University of Iowa Usage Restrictions None License Licensed 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.