PREVIEW. Weightlessness Effects on Human Vision and Mars Travel Implications. Bob Zimmerman discusses a NASA study regarding the profound effect of weightlessness on the human eye. The study, looking at 28 individuals from long ISS missions, found about h

PREVIEW. Weightlessness Effects on Human Vision and Mars Travel Implications. Bob Zimmerman discusses a NASA study regarding the profound effect of weightlessness on the human eye. The study, looking at 28 individuals from long ISS missions, found about half had vision problems because the eye flattens in weightlessness. Though previous studies noted bone and cardiovascular issues, this new discovery found that women had less of this specific problem than men. Mitigating these effects is required for Mars travel.








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