Heavier astronauts could experience more visual changes in microgravity
Roisin McGuigan |
We’ve covered the ophthalmic issues caused by spaceflight before (1)(2) – but now, there’s a new twist in this cosmic tale. It appears that changes in the eye observed in astronauts may be linked to their weight (3).
Jay Buckey, first author of the associated study, has a long-standing interest in the effects of microgravity on the human body – and has experienced them first hand, having flown in space as a specialist astronaut on several missions. “The more someone weighs the more likely they are to experience visual changes on long-duration spaceflights,” he explains. “From our work using numerical modeling to understand the effect of weightlessness on the eye, and from our previous studies, we had a strong feeling that the loss of tissue weight was an important, and unique, change that occurs in microgravity.”
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