Chapter 26 Flashcards
amblyopia
—a disorder in children caused by the eye muscles being weaker in one eye; also called lazy eye (26)
aqueous humor
—watery fluid that fills the anterior cavity of the eyeball (26)
astigmatism
—refractive eye disorder in which irregularities in the curvature of the cornea cause light not to focus on the retina but to spread out over an area and cause overall blurring of vision (26)
audiology
—study of hearing disorders (26)
auditory meatus
—auditory canal; tube that carries sound waves from the outer ear to the tympanic membrane (26)
canthus
—either of the two corners of the eye where the upper and lower eyelids meet (26)
cataract
—clouding over the lens of the eye; prevents light from entering (26)
cerumen
—earwax (26)
choroid
—membrane that lines the sclera and absorbs extra light entering the eye (26)
ciliary body
—part of the middle layer of the surface of the eyeball that holds and moves the lens (26)
cochlea
—bony spiral-shaped structure that forms a portion of the inner ear (26)
cones
—photosensitive cells in the retina that respond to bright light and are used in color vision (26)
conjunctiva
—protective mucous membrane lining the underside of the eyelid and the anterior part of the eyeball (26)
conjunctivitis
—an inflammation of the conjunctiva frequently caused by a virus, bacteria, sexually transmitted infections (STIs), allergens, and irritants; also called pinkeye (26)
cornea
—clear, transparent covering of the eye; frequently referred to as the “window” of the eye because it allows light to enter (26)
corneal abrasion
—lesion or abrasion on the cornea that results from injury or infection (26)
diabetic retinopathy
—disease of the retina secondary to diabetes mellitus (26)
diplopia
—double vision (26)
Eustachian tube
—auditory tube that extends from the middle ear to the nasopharynx (26)
fovea centralis retinae
—pit in the middle of the macula lutea that contains only cones (26)
fundus
—floor of the tympanic cavity (26)
glaucoma
—condition caused by an increase in the amount of pressure in the eye, leading to an excessive amount of aqueous humor that can lead to damage of the optic nerve and eventually blindness (26)
hordeolums
—inflamed glands of the eyelid, often caused by a bacterial infection that appears as a pus-filled swelling at the base of the eyelash; also called sties (26)
hyperopia
—farsightedness (26)
hypertensive retinopathy
—retinal disease caused by high blood pressure (26)
impacted cerumen
—earwax that becomes hardened and can impair hearing (26)
incus
—bone in the middle ear shaped like an anvil (26)