U.S. Air Force Capt. Roxanne Buffano, 927th Aersospace Medicine Squadron optometrist, looks through a slit lamp used to examine a patient's retina, at MacDill Air Force Base, Fla, Sept. 5, 2014. Buffano uses the device to look for warning signs of cancer, glaucoma and other potential ailments. (U.S. Air Force photo/Staff Sgt. Adam Borgman)