| Term | Definition |
| aqueous humor | watery fluid that fills anterior chamber of the eye |
| auricle | appendage on the side of the head |
| bony labyrinth | odd-shaped bony space filled with perilymph |
| cataract | is a clouding that develops in the crystalline lens of the eye |
| cerumen | earwax |
| chemoreceptor | responds to chemical stimuli |
| choroid | the dark-brown vascular layer of the eye between the sclera and the retina |
| cochlea | a spiral-shaped cavity of the inner ear that resembles a snail shell |
| conjunctiva | mucous membrane that lines the inner surface of the eyelid and the exposed surface of the eyeball |
| endolymph | the fluid in the membranous labyrinth of the inner ear |
| eustachian/auditory tube | connects the tympanic cavity with the nasal part of the pharynx |
| fovea centralis | area of most acute vision in retina |
| glaucoma | eye diseases characterized by abnormally high intraocular fluid pressure |
| hyperopia | farsightedness |
| incus | anvil |
| lacrimal gland | tear gland |
| lens | a transparent, biconvex body of the eyethat focuses light rays on retina |
| malleus | hammer |
| mechanoreceptor | responds to mechanical stimuli |
| myopia | nearsightedness |
| optic disc | blind spot |
| organ of Corti | the organ of hearing located in cochlea |
| ossicles | small bones |
| papillae | a small nipplelike projection |
| perilymph | The fluid in the space between the membranous and bony labyrinths of the inner ear |
| photoreceptor | specialized to sense or receive light |
| presbyopia | a gradual inability of the eye to focus on nearby objects |
| proprioceptor | detects the motion or position of the body or a limb |
| pupil | circular opening in the center of the iris of the eye |
| refraction | bending |
| retina | light-sensitive membrane lining the inner eyeball and connected by the optic nerve to the brain |
| sclera | the tough white fibrous outer envelope of tissue covering all of the eyeball except the cornea |
| semicircular canals | canals of the inner ear for balance |
| stapes | stirrup |
| tympanic membrane | eardrum |
| vestibular nerve | nerve that conducts impulses related to maintaining balance to the brain |
| vestibule | cavity or channel that leads to or is an entrance to another cavity |
| vitreous humor | clear gelatinous substance that fills the eyeball |