ELLSWORTH AIR FORCE BASE, S.D. -- (Right) Maj. Michael Bogaard, 28th Medical Group chief of optometry, uses a bio-microscope during Tech. Sgt. Heath Sowers, 28th Logistics Readiness Squadron noncommissioned officer in charge of receiving yearly evaluation, Dec 1. The microscope is used to examine the front and back surface of the eye. (U.S. Air Force photo/Airman 1st Class Adam Grant)
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