<a data-evt-val="{&quot;control_fields&quot;: {&quot;mparticle&quot;: {&quot;keys&quot;: {&quot;click_source_type&quot;: &quot;click_source_type&quot;, &quot;anchor_text&quot;: &quot;anchor_text&quot;, &quot;target_url&quot;: &quot;target_url&quot;, &quot;layout_section&quot;: &quot;layout_section&quot;}, &quot;mp_event_type&quot;: &quot;Navigation&quot;, &quot;extra_keys&quot;: [&quot;click_vertical_position_percentage&quot;, &quot;click_vertical_position_pixels&quot;]}}, &quot;click_source_type&quot;: &quot;in-page link&quot;, &quot;anchor_text&quot;: &quot;A new study from NASA&quot;, &quot;target_url&quot;: &quot;https://www.nasa.gov/missions/station/iss-research/vision-changes-on-space-station/&quot;, &quot;layout_section&quot;: &quot;in-page-link&quot;}" data-evt="click" data-evt-typ="click" href="https://www.nasa.gov/missions/station/iss-research/vision-changes-on-space-station/">A new study from NASA</a>, conducted over several years of long-duration spaceflights on the International Space Station, has found that more than half of U.S. astronauts started noticing changes in their vision after more than six months aboard the ISS. Here’s what to know.

More than half of those who spend six months or more on the space station come down with Space-Associated Neuro-ocular Syndrome or SANS.{ai:summary}A NASA study reveals that over half of U.S. astronauts experience vision changes after spending more than six months on the International Space Station. The research highlights the potential impact of long-duration spaceflights on ocular health. #science

There is a serious side effect to going to space, NASA says

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