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membrane lining of the inner surfaces of the eyelids and anterior portion of the eyeball over the white of the eye
a fibrous, transparent tissue layered over the pupil and iris that refracts light rays for proper focusing in the posterior of the eye
maintains the shape of the anterior portion of the eye and nourishes the structures in that region
sensitive receptor cells of the retina that function at reduced levels of light and are responsible for peripheral vision
sensitive receptor cells of the retina that function in bright levels of light and are responsible for color and central vision
Following a chemical change occurring in the rods and cones, nerve impulses are sent from the eye to the brain via this tissue.
the central depression of the macula; its composed largely of cones and is the location of the sharpest vision in the eye
rods and cones are stimulated in the left half of each retina if an object is on THIS side of the visual field
fibers from the left half of each retina form an optic tract leading to THIS side of the visual cerebral cortex
images are fused in the occipital lobe of the brain producing a single visual sensation
the loss of vision, which occurs in both eyes, on the contralateral visual field (e.g., damage to nerve cells in the right visual cerebral cortex causes loss of vision in the left visual field in both eyes)
inflammation of the conjunctiva occurring as a result of blood vessel dilation from allergens, bacterial infection, or virus
nonmedical professional who can examine eyes to determine vision problems and prescribe lenses
technique of cataract extraction using ultrasonic vibrations to fragment the lens and aspirate it from the eye
small, hard, cystic mass on the eyelid formed as a result of chronic inflammation of a sebaceous gland
retinal effects of diabetes mellitus including microaneurysms, hemorrhages, dilation of retinal veins, and neovascularization
increased intraocular pressure resulting in damage to the retina and optic nerve with loss of vision
localized, purulent, inflammatory staphyloccal infection of a sebaceous gland in the eyelid (i.e., sty)
progressive damage to the macula of the retina causing loss of central vision and blindness
repetitive rhythmic movements of one or both eyes caused by brain tumors or disease of the inner ears
trauma to the eye, head injuries, bleeding, scarring, or shrinkage of the vitreous humor can produce holes or tears resulting in THIS pathology
abnormal deviation of the eye due to weakness of the muscle controlling the position of the eye
visual field test
measurement of the area within which objects are seen when eyes are fixed, looking straight ahead without movement of head
intense, precisely focused light beam creates an inflammatory reaction that seals retinal tears and leaky retinal blood vessels
suture of a silicone band to the sclera over a detached portion of the retina; used to treat retinal detachment
part of the ear that leads from the pinna and is lined with numerous glands that produce a waxy substance; external auditory meatus
malleus; incus; stapes
three ossicles in order of vibration (separate these by semicolons and a space)
canal leading from the middle ear to the pharynx that helps prevent damage to the eardrum and shock to the middle and inner ears; auditory tube
two types of auditory fluids contained within the cochlea (separate these by semicolons and a space)
organ of Corti
tiny hair cells within the cochlea that receive vibrations from auditory liquids and relay sound waves to auditory nerve fibers
contains endolymph and sensitive hair cells essential for the transmission of impulses that help maintain equilibrium
surgical reconstruction of the bones of the middle ear with reconnection of the eardrum to the oval window
hearing disorder resulting from impairment of the middle ear ossicles and membranes
disorder of the labyrinth of the inner ear with elevated endolymph pressure within cochlea and semicircular canals; symptoms include tinnitus, sensitivity to sound, loss of hearing, headache, and vertigo
hardening of the bony tissue of the middle ear causing fixation of the stapes bone and eventual deafness
cochlear implant procedure
surgical insertion of a device that allows sensorineural hearing-impaired persons to understand speech
tuning fork test where examiner places the base of the vibrating fork against mastoid bone
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