Organoid cones-rods (IMAGE) Johns Hopkins University Caption Retinal organoid marked to show blue cones in cyan and green/red cones in green. Cells called rods that help the eye see in low-light or dark conditions are marked in magenta. Credit Sarah Hadyniak/Johns Hopkins University Usage Restrictions none 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.