This document defines and describes several terms related to the special senses of vision and hearing. It defines conditions such as amblyopia, commonly known as lazy eye, and diplopia, or double vision. It also defines medical terms such as mydriatic drops, which cause pupil dilation, and miotic drops, which cause pupil constriction. Additional terms defined include presbyopia, tinnitus, tympanometry, labyrinth, and audiogram. The document concludes by describing otitis media, commonly known as a middle ear infection.