Research targets vision loss in astronauts during long space missions

In July 1969, Neil Armstrong became the first astronaut to walk on the moon. The Apollo 11 mission lasted about four days. Now more than 50 years later, astronauts are making much longer trips into space and looking ahead to the potential for even lengthier space flights that could keep astronauts in space for months and years at a time. That possibility brings a new physical challenge for astronauts to deal with: vision loss.