Staff Sgt. Allen Kirby gives Airman 1st Class Brent Showalter a cornea exam. Air Force Staff Sgt. Allen Kirby (left) gives Airman 1st Class Brent Showalter a cornea exam at Ramstein Air Base, Germany, on April 18, 2006. Kirby is an optometry technician with the 435th Aero-Medical Squadron and Showalter is attached to the 1st Combat Communications Squadron. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 280456-V-SGA19-874.jpg Photo Gallery