Cosmonauts Alexander Misurkin (foreground) and Sergey Ryazanskiy participate in a remotely guided eye exam with assistance from doctors on Earth.
iss053e238919 (Nov. 21, 2017) — Cosmonauts Alexander Misurkin (foreground) and Sergey Ryazanskiy participate in a remotely guided eye exam with assistance from doctors on Earth using Optical Coherence Tomography gear. Misurkin was the Crew Medical Officer and Ryazanskiy was the subject helping doctors understand how living in microgravity impacts vision.