![]() “We now have a few astronauts that have flown even longer duration missions of up to 1 year in space and our preliminary findings suggest that spaceflight mission duration may contribute to worsened ocular structural changes, such as swelling of the optic nerve head tissues.” Macias, director of the Cardiovascular and Vision Laboratory at NASA Johnson Space Center in Houston, in an email. “After astronauts began flying long-duration spaceflight missions of about 6 months, we started observing changes in the eyes of some astronauts that we had not observed when they flew short about 2-week long missions on the Space Shuttle,” said study author Brandon R. Researchers now refer to ophthalmologic and neurologic findings in astronauts after long-duration spaceflight as spaceflight-associated neuro-ocular syndrome, also known as SANS.Ī new study focused on ocular changes and issues experienced by Kelly and Kornienko published Thursday in the journal JAMA Opthalmology. The impact on the health of astronauts’ vision as a result of long-term spaceflight previously was known as visual impairment and intracranial pressure, or VIIP, syndrome. Humans have been living on the space station for 20 years 24, 2013, NASA astronaut Mike Hopkins, Expedition 38 flight engineer, participated in the second of two spacewalks, spread over a four-day period, which were designed to allow the crew to change out a degraded pump module on the exterior of the Earth-orbiting International Space Station.
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