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Study Guide Ch 17

Chabner, Language of Medicine 8th Edition, Chpt 17 Sense Organs: The Eye and Ear

cornea fibrous layers of clear tissue that extends over the anterior portion of the eye and is continuous with the white of the eye
macula lutea yellowish region in the retina;contains the fovea centralis
lens eye structure is transparent, biconvex, and focuses light on the retina
optic chiasma where optic nerve fibers cross in the brain
accomodation adjustment of the lens by the ciliary body
cones photosensitive receptor cells of the retina; make the perception of color possible
kerat/o combining form for cornea
cycl/o combining form for the ciliary body
eyelid combining form: palpebr/o
conjunctivitis an eye inflammation commonly called "pinkeye"
presbyopia impairment of vision due to old age
myopia nearsightedness
astigmatism defective curvature of the cornea or lens
tonometry glaucoma is primarily diagosed with this procedure
scotoma a blind spot; area of depressed vision surrounded by an area of normal vision
macular degeneration produces loss of central vision
chalazion small hard mass on the eyelid; formed from a sebaceous gland enlargement
cochlea snail-shaped, spirally wound tube in the inner ear
eustachian tube channel between the middle ear and the nasopharynx
myring/o combining form for tympanic membrane
suppurative otitis media bacterial infection of the middle ear
tinnitus ringing sound in ears
otoscopy visual examination of the ear
presbycusis nerve deafnes occuring with aging
otomycosis fungal infection of the ear
choroid vascualr layer of the eyeball that is continuous with the iris
conjunctiva delicate membrane lining the eyelids and covering the anterior eyeball
iris colored portion of the eye; surrounds the pupil
pupil dark center of the eye through which light rays enter
sclera tough white outer coat of the eyeball
ciliary body contains muscles that control the shape of the lens and secrete aqueous humor
lens transparent body behind the iris and in front of the vitreous humor; refracts light rays to bring them into focus on the retina
retina contains sensitive cells (rods & cones) that transmit light energy to nervous impulses
vitreous humor jelly-like material behind the lens; helps to maintain the shape of the eyeball
aphakia absence of the lens of the eye
esotropia inward deviation of the eye
hemianopsia absence of vision in half of the visual field
uveitis inflammation of the vascualr layer of the eye
exotropia outward deviation of the eye
xerophthalmia condition of dry eyes
cataract clouding of the lens causes decreased vision
glaucoma increased intraocular pressure results in retinal and optic nerve damage
macular degeneration deterioration of the macula lutea of the retina
diabetic retinopathy retinal microaneurysms, hemorrhages occur secondary to an endocrine condition
hordeolum (stye) localized purulent infection of a sebaceous gland in the eyelid
strabismus abnormal deviations of the eye
Created by: megaly ryan