Capt. Frank Cumbie, 1st Helicopter Squadron pilot, sits still while a Technolas Orbscan is taken of the his eye March 18, 2015, in Malcolm Grow Medical Clinics and Surgery Center on Joint Base Andrews, MD. The Orbscan measures multiple regions within the patient’s eye to provide critical information to surgical staff prior to a Photorefractive Keratectomy procedure. (U.S. Air Force photo/Senior Airman Preston Webb)

Capt. Frank Cumbie, 1st Helicopter Squadron pilot, sits at a slit lamp while his eye is examined prior to a Photorefractive Keratectomy procedure March 18, 2015, in Malcolm Grow Medical Clinics and Surgery Center on Joint Base Andrews, MD. The slip lamp allows a doctor to examine patients’ eyes prior to procedures such as PRK. (U.S. Air Force photo/Senior Airman Preston Webb)

Col. (Dr.) Joseph Giovannini, 779th Aerospace Medical Squadron ophthalmologist, uses a rotary scrubber to remove epithelium cells prior to a Photorefractive Keratectomy procedure March 18, 2015, in Malcolm Grow Medical Clinics and Surgery Center on Joint Base Andrews, MD. After scrubbing, a laser can reshape the eye as needed for the patient’s prescription. (U.S. Air Force photo/Senior Airman Preston Webb)

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)