Senior Airman Mitchel Delfosse, 22nd Aircraft Maintenance Squadron electrical environmental system journeyman, gets his eyes checked using a slit lamp, Jan. 30, 2020, at McConnell Air Force Base, Kan. The slit lamp allows the optometrist to see a 3D version of the inside of the eye. It also is used to check for any eye abnormalities. (U.S. Air Force photo by Airman 1st Class Alexi Bosarge)