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Mod 140 unit 4


Orbit Cone-shaped cavity that contains the eyeball; padded with fatty tissue
Conjunctiva Delicate, transparent mucous membrane that covers the inside of the eyelids and anterior surface of the eye; produces tears
Lacrimal Apparatus Structures involved with the secretion & production of tears.
Choroid Spongy membrane of the blood vessels that begins at the Iris& continues around the eye.
Retina Membrane lining the posterior cavity;cotains rods and cones.
Cornea Transparent layer over the anterior part of the eye.
Iris Colored ring of tissue whose muscles Iris pupil in the center of the Iris.
Lens Clear, hard, disk in the internal eye.
Ciliary Body Smooth muscle that alters the lens of the eye to accommodate for near vision.
Accomodation Muscles can alter the shape of the lens, making it thinner/thicker to allow the incoming light rays to focus on the retinal area.
Rods & Cons Light sensitive cells in the retina; black & white(rods), red, green or blue (cons)
Astigmatism Defect in the refractive powers of the eye in which a ray of light isnt focused on the retina, but is spread over an area.
Strabismus Disorder of the eye in which the optic axes cannot be directed to the same object.
Cataract Clouding of the lens.
Conjunctivitis Inflammed, reddened & swollen conjunctivae with dialated blood vessels on the sclerae.
Glaucoma Increased intraocular pressure (IOP)aqueous humor cannot circulate freely.
Hyperopia Farsightendness.
Presbyopia Loss of flexibility of the lens with blurry near vision & loss of accommodation.
Myopia Nearsightedness.
Amblyopia To prevent double vision, the brain ignores visual images from a misaligned eye.
Pinna The auricle of the exterior ear that collects sound waves.
Tympanic Membrane Membrane that divides the external ear from the middle ear; eardrum.
Ossicles Three tiny bones in the middle ear that functions in the process of hearing: malleus, incus, & stapes.
Malleus First bone of the middle ear.
Incus Second bone of the middle ear.
Stapes Third bone of the middle ear.
Cochlea Structure of the inner ear that is associated with the sense of hearing.
Vestibule Houses the internal ear.
Semicicular Canals Three canals in the inner ear that are oriented in different planes that help the body keep its balance.
Audiometry The measure of hearing.
Otosclerosis An abnormal bone growth in the middle ear.
Presbyscusis The gradual los of hearing.
Vertigo Sensation of being off balance when the body is not moving.
Meniere's Disease Recurring and progressive disease that includes progressive deafness,ringing ears, dizziness & the feeling of fullness in the ears.
Otitis Media Acute or chronoic bacterial infection of the middle ear.
Tinnitus Sounds that are heard constantly or intermittenly in one or both ears, even in a quiet environment.
Auditory Meatus The passages in the outer ear from the auricle to the tympanic membrane.
Organ of Corti Contains hair cell sensory receptors for hearing.
Rinne Test A hearing test that utilizes a tuning fork to compare bone conduction (BC)hearing with air conduction (AC).
Created by: Bianca Jones