U.S. Air Force Senior Airman Cole Bonack, 633rd Aerospace Medicine Squadron Optometry technician, has his eyes examined by a slit lamp at Langley Air Force Base, Va., Jan. 16, 2015. The Langley Optometry Clinic recommends U.S. Service members schedule yearly eye examinations to diagnose any issues at an early stage. (U.S. Air Force photo by Airman 1st Class Areca T. Wilson/Released)