US Navy 080812-N-9774H-084 Hospital Corpsman 3rd Class Richard Utley, a Navy augmentee working as an optometric technician embarked aboard the amphibious assault ship USS Kearsarge (LHD 3), uses a tono pen to test ocular pressu
Autore: U.S. Navy photo by Mass Communication Specialist 1st Class Emmitt J. HawksLink di attribuzione: commons.wikimedia.org