Nimesh Patel, University of Houston (IMAGE) University of Houston Caption University of Houston optometrist Nimesh Patel studies the vision of returning International Space Station astronauts and proves a structural change to their eyes. Credit University of Houston 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.