U.S. Air Force Maj. Lauren Matthews, 28th Medical Group optometrist, right, uses a slit lamp to examine the eye of Senior Airman Keri Carpenter, 37th Bomb Squadron all-source intelligence analyst, at Ellsworth Air Force Base, S.D., Jan. 24, 2025. A slit lamp emits a beam of light that allows optometrists to examine the eye’s anatomy in three-dimension high detail. (U.S. Air Force photo by Airman Addison Bolt)