Retina (IMAGE) Proceedings of the National Academy of Sciences Caption This is a retina from a retinitis pigmentosa mouse model demonstrating loss of cones (green) in the central retina. Credit Sean K. Wang 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.