20/20 Vision
Michael Hoskins, 2nd Aerospace Medical Squadron paraoptometric technician, gives a cover test to 1st Lt. Tiffanie Katz, 2nd Comptroller Squadron financial services flight commander, during a routine eye exam on Barksdale Air Force Base, La., April 4, 2013. The test is used to detect for a muscle imbalance which can cause a patient to be prescribed glasses. (U.S. Air Force photo/Senior Airman Sean Martin)