CATARACT TEST U.S. Air Force Capt. Christy Barton performs a cataract test on a Ghanaian woman in Tamale, Ghana, during Exercise Med Flag 2006, Sept. 12, 2006. Med Flag is a medical-training exercise in which medical personnel from U.S. Air Forces in Europe are treating residents and training local health care workers. SHARE: Download: Full Size (0.1 MB) Credit: VIRIN: 706942-E-RBR68-671.jpg Photo Gallery