Optometry
Olivia Morris, a Flight Medicine nurse, takes a Distance Visual Acuity Test at the Optometry Clinic on Joint Base Andrews, Md., June 6, 2015. The test measures eyesight at various distances. (U.S. Air Force photo/ Airman 1st Class J.D. Maidens)

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Photo by: Unknown |  VIRIN: 150602-F-XT094-020.JPG