Luca Parmitano and Chris Cassidy (IMAGE) University of Houston Caption Luca Parmitano collects Fundoscope images of the back of the eye with the assistance of Chris Cassidy for NASA's ocular health experiment. Credit NASA 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.