Astronaut Mark Vande Hei Gets His Eyes Checked on StationNASA astronaut Mark Vande Hei gets detailed views of his retina as part of regularly scheduled eye checks on the station.Read More Facebook Pinterest X LinkedIn Email https://www.nasa.gov/image-detail/astronaut-mark-vande-hei-gets-his-eyes-checked-station/Copy URL to clipboard> DownloadShareSize1041x694px