What Is Spaceflight Associated Neuro-ocular Syndrome?Seventy percent of astronauts on the International Space Station experience some amount of swelling in the back of the eye. What causes this swelling?Read More Facebook Pinterest X LinkedIn Email https://www.nasa.gov/image-detail/what-spaceflight-associated-neuro-ocular-syndrome/Copy URL to clipboard> DownloadShareSize1041x1388px