Image credit: NASA
Uploader comment: ISS034-E-035949 (21 Jan. 2013) --- NASA astronaut Tom Marshburn (right), Expedition 34 flight engineer, performs a Tonometry eye exam on Canadian Space Agency astronaut Chris Hadfield, flight engineer, in the Columbus laboratory of the International Space Station. The purpose of this exam is to measure intraocular eye pressure.
February 18, 2013, 6:21 pm