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Astronauts Tom Marshburn and Chris Hadfield
Posted on Tuesday, February 19, 2013
Uploaded by
Waspie_Dwarf
Image credit: NASA
Uploader comment: ISS034-E-035949 (21 January 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.
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