This document provides common medical abbreviations used in ophthalmology and otology. Abbreviations include PE for pressure equalizing tube, EENT for eye, ear, nose and throat, and BC for bone conduction. Other abbreviations include AU for both ears, OM for otitis media, EM for emmetropia, XT for extropia, OS for left eye, EOM for extraocular movement, and VA for visual acuity.