Accommodation
When the muscle controls the shape of the eye for vision.
Anterior chamber
Filled with a watery fluid called aqueous humor fluid.
Anvil (incus)
Tiny bones in the ear.
Aqueous humor
Constantly filtered and drained and gives nourishment.
Cerumen
Wax like oily substance.
Choroid coat
Middle layer of the eye. Contains blood vessels to nourish the eye.
Ciliary body
Consists of the smooth muscle that controls the shape of the eye.
Cochlea
Snail-shaped structure where sound vibrations are converted into nerve impulses.
Cochlear duct
The semicircular canals and auditory nerves.
Color blindness
Inability to distinguish colors.
Cones
Allows for color.
Cornea
The very front of the eye.
Deviated nasal septum
A condition in which there is a bend in the cartilage structure of the septum.
Eustachian tube
Serves to equalize the air pressure in the middle of the ear with that of the outside atmosphere.
Extrinsic muscle
Muscles responsible for moving the eye within the orbital socket.
Eye strain
Burning, tightness, sharp or dull pain, water, blurry vision and head aches caused by discomfort.
Fovea centralis
Contains the cones for color vision.
Hammer (malleus)
Tiny bone found in the ear.
Iris
A colored muscular layer that surrounds the eye.
Lens
Crystalline structure located behind the iris and pupil.
Macula lutea
A yellow disc
M�ni�re's disease
A rare condition that affects the semicircular canals of the inner ear causing dizziness.
Miotic
Constrict the pupil and increase outflow of aqueous humor.
Myringotomy
An opening made in the tympanic membrane.
Nasal polyp
Soft, noncancerous growths in the lining of the nasal passages or sinuses.
Night blindness
A condition that makes it difficult to see at night.
Optic disc (blind spot)
Contains no rods or cones and therefore is unable to convert images.
Organ of corti
Located within the cochlea of the inner ear. Receptor for hearing.
Otitis media
An infection of the middle of the ear.
Ostosclerosis
A condition in which the stapes bone in the middle of the ear first becomes spongelike and then hardens.
Oval window
Located just under the base of the stapes and is the membrane that separates the middle ear from the inner ear.
Pinna
Collects sound waves and directs the to auditory canal.
Posterior chamber
Helps to situate the lens along with the anterior chamber.
Presbycusis
Sensorineural hearing loss which involves changes in the neutral, sensory, and mechanical structure in the inner ear.
Pupil
Circular opening in the choroid coat.
Retina
Innermost part of the eye. Located between posterior chamber and choroid coat.
Rhinitis
Inflammation of the lining of the nose that may cause nasal congestion, drainage, sneezing, or itching.
Rods
Sensitive to dim light.
Sclera
The outer layer of the eye or the white of the eye.
Semicircular canal
Contains liquid and hairlike cells that bend when the liquid is set in motion.
Stirrup (stapes)
Tiny bones in the ear.
Suspensory ligament
Holds he lens in place.
Tinnitus
Ringing in the ears.
Tympanic membrane
Eardrum.
Vertigo
Dizziness.
Vitreous humor
A transparent jellylike substance, fills the posterior chamber. Helps to maintain shape.