ESA astronaut Sophie Adenot shows off the Optical Coherence Tomography machine

iss074e0433179 (April 3, 2026) --- ESA (European Space Agency) astronaut and Expedition 74 flight engineer Sophie Adenot smiles for a portrait while showing off an Optical Coherence Tomography machine, a medical imaging device used for eye exams. Doctors on the ground monitor the eye exam in real-time viewing an astronaut's retina, lens, and cornea. Vision is critical to a mission’s success and doctors regularly check the astronauts’ eyes to counteract the potential effects of living in space.