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The Impact of Space on Astronauts’ Eyesight

The environment of outer space presents unique challenges to human physiology, including effects on vision. The absence of Earth’s gravitational pull in a microgravity setting has been shown to lead to a phenomenon known as Spaceflight Associated Neuro-ocular Syndrome (SANS). This condition has been a subject of concern among researchers, clinicians, and space agencies due to its potential to adversely affect an astronaut’s ability to perform tasks that require keen eyesight.

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