Can you see your future?
Capt. Caitlyn Woods uses a phoropter on Staff Sgt. Catherine Martin to check her vision and determine the correct prescription for her glasses March 11, 2010, at Minot Air Force Base, N.D. Captain Woods is a 5th Medical Operations Squadron chief of optometry services, and Sergeant Martin is a 5th Medical Group alternate personnel reliability program monitor. (U.S. Air Force photo/Staff Sgt. Keith Ballard)