Maj. Carli Murphy, 436th Aerospace Medicine Squadron optometry flight commander, performs a test on Staff Sgt. Courtney Herrera, 436th Medical Support Squadron radiologic technologist, during a routine eye examination May 8, 2019, at the Optometry Clinic on Dover Air Force Base, Del. The test allowed Murphy to refine Herrera’s contact lens prescription. (U.S. Air Force photo by Roland Balik)