This document provides definitions and abbreviations for common ophthalmic and otologic terms. It defines terms related to the ear like pressure equalizing tubes (PE tube), otitis media (OM), and bone conduction (BC). It also defines eye-related terms such as extraocular movement (EOM), exotropia (XT), emmetropia (EM), visual acuity (VA), and others. For each term it provides a brief definition and relevant context in 1-3 sentences.