Senior Airman Nichelle Patterson, 99th Aerospace Medicine optometry technician, checks Maj. Ivy Madson’s, 99th AMDS optometry flight commander, eyes June 25, 2014, at Nellis Air Force Base, Nev. The 99th AMDS optometry clinic uses the Pentacam, a comprehensive eye scanner to detect if the patient has thin corneas and to determine if they are a good candidate for refractive surgery. (U.S. Air Force photo by Airman First Class Rachel Loftis)
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