Capt. Frank Cumbie, 1st Helicopter Squadron pilot, lies motionless while surgical staff finds his face’s midline to a Photorefractive Keratectomy procedure March 18, 2015, in Malcolm Grow Medical Clinics and Surgery Center on Joint Base Andrews, MD. Centering the patient prior to PRK ensures the proper landmarks can be easily located during the procedure. (U.S. Air Force photo/Senior Airman Preston Webb)