In this longitudinal analysis, Michael A. Novak, MD (Carle Foundation Hospital, Department of Otolaryngology, University of Illinois at Urbana-Champaign, Carle-Illinois College of Medicine, Urbana, Illinois, United States) demonstrates how the OtoScan helps to determine the presence or absence of fluid in the middle ear, characterize the type of fluid, visualize the fluid's density, and can do all of this even in the presence of significant wax.