A noncontact tonometer scans the eye of U.S. Air Force Staff Sgt. Timothy Gallagher, 23d Wing public affairs broadcast journalist, during an optometry appointment Feb. 4, 2014, at Moody Air Force Base, Ga. The tonometer is used to screen for glaucoma. (U.S. Air Force photo by Airman 1st Class Ceaira Tinsley/Released)
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