U.S. Air Force Maj. Ethan Woodbury, the 35th Aerospace Medicine Squadron optometry flight commander, checks a binocular indirect ophthalmoscope at Misawa Air Base, Japan, Feb. 7, 2018. The BIO machine is used for retinal and dilated eye exams. Optometrists are one specialty of the 18 in the Biomedical Science Corps. The biomedical sciences corps mission is to enhance U.S. Air Force combat capability and effectiveness. (U.S. Air Force photo by Airman Xiomara M. Martinez)
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