LANGLEY AIR FORCE BASE, Va. -- Tech. Sgt. Bryce Perdomo, 1st Aerospace Medicine Squadron ophthalmic craftsman, administers an Auto Kerato-Refraction test to Tiffany Alston, certified ophthalmic assistant here Aug. 18. August is National Children's Vision and Learning Month, so before children start heading back to the classroom, the American Optometric Association (AOA) recommends a visit to the optometrist. (U.S. Air Force photo/Airman 1st Class Jonathan Koob)