John Dresel, 341st Medical Operations Squadron optometry technician, demonstrates preliminary testing with Tel Todd, former optometry clinic intern, Nov. 2, 2016, at Malmstrom Air Force Base, Mont. Dresel says his primary function in the optometry clinic is to provide excellent customer service and to administer preliminary testing to patients before they are seen by the doctor.

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Photo credit: © Nelly George / Alamy / Afripics
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