Vertebrate Visual Cycle (IMAGE) University of California - San Diego Caption A schematic of the vertebrate visual cycle highlighting the physical separation of light sensing. Credit Daugherty Lab, UC San Diego Usage Restrictions Must be used in conjunction with PNAS paper on vertebrate eye innovation. 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.