Karen Nyberg, NASA (image) NASA/Johnson Space Center Caption Expedition 36/37 Flight Engineer Karen Nyberg of NASA uses a fundoscope to take still and video images of her eye while in orbit. This was the first use of the hardware and new vision testing software. Credit Photo credit: NASA Usage Restrictions None 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.