Staff Sgt. Crystal Jacquot, 28th Bomb Wing NCO in charge of wing information management, experiences a puff of air from a non-contact tonometer used to determine her eyes' intraocular pressure here, May 20. Intraocular pressure is a measurement of the fluid pressure inside the eye that helps the eye maintain its globular shape. (U.S. Air Force photo/Airman Corey Hook)