Maj. Scott Martin, 23d Aerospace Medicine Squadron optometry flight commander, poses for a photo with various pieces of optometry equipment, Jan. 19, 2016, at Moody Air Force Base, Ga. Optometrists are responsible for examining, diagnosing, treating and managing diseases and disorders of the visual system. In the Air Force, there are currently 136 active duty, 74 Air Force reservist and 90 Air National Guard optometrists. (U.S. Air Force photo by Airman 1st Class Daniel Snider)