1. UH optometrist investigates changes in eye structure in astronauts

    UH optometrist investigates changes in eye structure in astronauts

    Astronauts who spend time aboard the International Space Station return to Earth with changes to the structure of their eyes which could impact their vision. NASA has studied the phenomenon, known as space flight-associated neuro-ocular syndrome (SANS), for several years, and now a University of Houston optometrist has quantified some of the changes using optical coherence tomography imaging, reporting his findings in JAMA Ophthalmology . "We studied pre-flight and post-flight data from 15 astronauts who had spent time aboard the space station and detected changes in morphology of the eyes," said Nimesh Patel, assistant professor. All of them had good vision ...

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    1. We studied pre-flight and post-flight data from 15 astronauts who had spent time aboard the space station and detected changes in morphology of the eyes.
    2. The findings of this study show that in individuals exposed to long-duration microgravity, there is a change in the position of the Bruch membrane opening, an increase in retinal thickness closer to the optic nerve head rim margin, and an increase in the proportion of eyes with choroidal folds.
    3. The results of these investigations suggest that, although there may be resolution of structural changes, there could be long-term ocular anatomical changes after extended-duration spaceflight.
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