Phoropter Adjustment Air Force Lt. Col. Mark Davis with the 147th Medical Group adjusts a manual phoropter in order to find the correct prescription lenses for a patient during Arctic Care 2017 in Kodiak, Alaska, March 28, 2017. The Air Force Reserve-led medical readiness exercise gives service members an opportunity to train on deployable medical equipment while serving the citizens of Kodiak Island Alaska. Air Force photo by Master Sgt. Luke Johnson SHARE: Download: Full Size (0.29 MB) Tags: Air Force Credit: Master Sgt. Luke Johnson VIRIN: 170328-F-TK777-133.JPG Photo Gallery