Ultrasound Eye Imaging with Astronauts (IMAGE) NASA/Johnson Space Center Caption NASA astronaut Michael Hopkins and European Space Agency astronaut Luca Parmitano perform ultrasound eye imaging as part of the Fluid Shifts investigation during Expedition 37 on the International Space Station. 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.