U.S. Air Force Capt. Kevin Anderson, 37th Bomb Squadron flight surgeon, sits for an Optical Coherence Tomography (OCT) of his retina at Ellsworth Air Force Base, S.D., Jan. 24, 2025. The OCT can visualize layers of the retina and other structures, which helps in diagnosing and monitoring various eye conditions. (U.S. Air Force photo by Airman Addison Bolt)