Cones in the Retina (IMAGE) Optica Caption These are images of the smallest cone photoreceptors in the retina, about 2 microns wide. Coloration was added to represent the different wavelengths of light used to capture the images after compensating chromatic aberration. Credit Xiaoyun Jiang, Ramkumar Sabesan, University of Washington 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.