NASA lays out a plan to investigate the effects of prolonged weightlessness on vision: ISS Program Takes On Astronaut Vision Problems – Aviation Week.
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DARPA is supporting a project called Membrane Optic Imager Real-Time Exploitation (MOIRE), which is developing very lightweight optical elements that could greatly improve the resolution of imaging from geostationary orbit: DARPA Moire Project Seeks Real-Time Space Imaging – CitizensInSpace.org.