Maj. Bryan Kemper, 28th Medical Operations Squadron chief of optometry, utilizes an indirect ophthalmoscope during a health examination for Airman 1st Class Nichole Porrini, 28th Security Forces Squadron flight member, Ellsworth Air Force Base, S.D., Dec. 13, 2011. Indirect ophthalmoscopes provide a wider view of a patient’s eye to determine the health of the retina. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)