HOUSTON — Human space travelers may have more than rising intraocular pressures to be concerned about when it comes to their eyesight, according to a NASA-funded study of mice that revealed profound changes in eye structure and gene expression after just 13 days in space. The study of 18 mice aboard one of the final U.S. space shuttle missions, which was the first to examine eye-related gene expression and cell behavior post- flight, looked at effects from low gravity, solar radiation ...


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