U.S. Air Force Staff Sgt. Jaime Carranza, flight medicine section chief with the 62d Medical Squadron, conducts a distant visual acuity test on a patient at Joint Base Lewis-McChord, Washington, Feb. 3, 2023. The distant visual acuity test is used to determine the smallest letters one can read on a standardized chart. (U.S. Air Force photo by Senior Airman Callie Norton)
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