Scott Kelly, the first American to spend a continuous year in space, wrote in his book, “Endurance,” about the vision changes he experienced on many of his spaceflights. His vision would get blurry about 10 to 12 feet in front of him, he wrote, but eventually returned to normal back on Earth. After his first long-duration flight, which lasted 159 days, Kelly wrote that doctors found swelling of his optic nerve as well as choroidal folds, similar to stretch marks, on his eye. NASA researchers have identified these and other eye problems, such as the flattening of eye shape, in many male astronauts on long-duration space missions.
Monday, January 08, 2018
Space flight vision problems
David Reneke has an article on Space Flight-Associated Neuro-ocular Syndrome