Subjects who underwent a ground-based analogue of weightlessness experienced greater peripapillary total retinal thickness but less choroidal thickening compared with astronauts during approximately 30 days of spaceflight, according to a study.
“NASA is studying why some astronauts develop optic disc edema during long-duration spaceflight. This experiment used optical coherence tomography imaging to quantify the onset and resolution of optic disc edema in healthy volunteer subjects exposed to strict head-down tilt bed rest for 30 days. Using this bed rest model, NASA will be able to test
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