U.S. Army Dr. (Lt. Col.) Michael Hamilton (left), McDonald Army Health Center ophthalmologist, performs eye surgery while a technician keeps the eye hydrated during cataract surgery at Fort Eustis, Va., March 7, 2013. Professionals working in the eye clinic provide comprehensive vision examinations as well as advanced eye care with surgical treatment for diseases such as cataract extraction. (U.S. Air Force photo by Staff Sgt. Ashley Hawkins/Released)