U.S. Army Dr. (Lt. Col.) Michael Hamilton (left), McDonald Army Health Center ophthalmologist, performs cataract surgery as a technician assists at Fort Eustis, Va., March 7, 2013. The Ophthalmology section is a portion of the eye clinic that provides advanced specialty eye care with medical and surgical treatment for diseases and conditions of the eye, such as cataract extraction and diabetic eye exams. (U.S. Air Force photo by Staff Sgt. Ashley Hawkins/Released)