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Study Guide Ch 17
Chabner, Language of Medicine 8th Edition, Chpt 17 Sense Organs: The Eye and Ear
| Question | Answer |
|---|---|
| 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
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