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Science and Technology Daily News (intern reporter Zhang Jiaxin) Astronauts may face eye problems when "travelling" in space - space neuro-eye syndrome (SANS), a disease characterized by progressive flattening of the eyeball, swelling of the optic nerve and vision obstacles
On Earth, every time people get up, gravity "pulls" bodily fluids back from the brain
The disease, called SANS, has plagued scientists for more than a decade and has been one of the biggest health problems in human space exploration
In the experiment, a volunteer lay on a bed for 72 consecutive hours
The researchers found that while just lying flat for three days created enough pressure for bodily fluids to slightly change the shape of the eyeball, this change did not occur when the new sleeping bag was used
According to NASA records, more than half of astronauts serving at least six months on the International Space Station have vision problems
