Try not to blink
Staff Sgt. Scott Drake moves the auto refractor joy stick around to focus more clearly on the patients eye during an exam March 3, 2011 Eielson Air Force Base, Alaska. The machine provides a rough estimate of what should be a patient's prescription. Sergeant Drake is an optometry technician assigned to the 354th Medical Group. (U.S. Air force photo/Airman 1st Class Laura Goodgame)
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