U.S. Air Force Capt. Sean Berensen, 633rd Medical Group optometrist, conducts an eye exam on Chief Master Sgt. Elaine Cole, Air Combat Command commander support staff superintendent, during her annual eye exam at Langley Air Force Base, Va., April 18, 2013. In addition to routine eye exams, the clinic offers single, bi-focal, tri-focal, spectacle and contact lens prescriptions to all active-duty personnel. (U.S. Air Force photo by Staff Sgt. Antoinette Gibson/Released)