re: Fluid buildup is causing astronauts' vision to be impaired after stays in space

quote:

---

if we want to think about colonisation or extended stays on Mars, we’re going to have to consider blindness as a potential complication.

---

I suspect this is an issue with prolonged periods of microgravity. People wouldn't have these issues from staying on Mars. However, we do need to develop spacecraft that rotate to create gravity to live with for the journey to Mars.