A model of an eye sits on U.S. Air Force Capt. Kerry Phelan's exam room at the 18th Medical Group optometry clinic at Kadena Air Base, Japan, Oct. 12, 2011. Ophthalmic specialists attend eight weeks of training at Sheppard Air Force Base, Texas, to learn how to diagnose eye disorders and what medications to give patients. (U.S. Air Force photo/Airman 1st Class Brooke P. Beers/Released)
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