Spaceflight-associated Neuro-ocular Syndrome (SANS)

Spaceflight-associated Neuro-ocular Syndrome (SANS) is a condition observed in astronauts during and after long-term space missions. It affects vision and involves changes in the optic nerve, retina, and brain regions associated with sight. In microgravity, fluids in the body shift, leading to pressure changes that can impact the eyes and vision. Symptoms may include blurred vision, changes in visual acuity, and swelling around the optic nerve. Understanding SANS is crucial for ensuring the health of astronauts during missions, particularly as space travel expands for exploration and potential colonization of other planets.