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Medical Terminology
Chapter 5
| Term | Definition |
|---|---|
| blephar/o | eyelid |
| cycl/o | circle, ciliary body |
| dacry/o | tear |
| kerat/o | cornea |
| lacrim/o | tear |
| phac/o | lens (lentil) |
| phak/o | lens (lentil) |
| presby/o | old age |
| vitre/o | glassy |
| -opia (suffix) | condition of vision |
| anterior chamber | fluid-filled space between the cornea and iris |
| aqueous humor | watery liquid secreted by the ciliary processes that fills the anterior and posterior chambers of the eye and provides nourishment for the cornea, iris, and lens |
| scleral venous sinus | duct in the anterior chamber that carries filtered aqueous humor to the veins and bloodstream; also called canal of Schlemm |
| choroid | vascular layer beneath the sclera that provides nourishment to the outer portion of the retina |
| ciliary body | ring of tissue behind the peripheral iris that is composed of ciliary muscle and ciliary processes |
| ciliary processes | epithelial tissue folds on the inner surface of the ciliary body that secrete aqueous humor |
| palpebra | movable, protective fold that opens and closes, covering the eye; also called eyelid |
| fovea centralis | pinpoint depression in the center of the macula lutea that is the site of sharpest vision |
| fundus | interior surface of the eyeball, including the retina, optic disc, macula lutea, and posterior pole |
| Zeis glands | oil glands opening into the follicles of the eyelashes |
| tarsal glands | oil glands located along the rim of the eyelids; also called meibomian glands |
| lacrimal gland | gland located in the upper outer region above the eyeball that secretes tears |
| lens | transparent structure behind the pupil that bends and focuses light rays on the retina |
| macula lutea | central region of the retina; responsible for central vision; yellow pigment provides its color |
| nasolacrimal duct | passageway for tears from the lacrimal sac into the nose |
| optic disc | exit site of retinal nerve fibers as well as entrance point for retinal arteries and exit point for retinal veins |
| posterior chamber | space between the back of the iris and the front of the vitreous chamber; filled with aqueous humor |
| retina | innermost layer that perceives and transmits light to the optic nerve |
| asthenopia | eyestrain |
| blepharospasm | involuntary contraction of the muscles surrounding the eye causing uncontrolled blinking and lid squeezing |
| diplopia | double vision |
| exophthalmus | abnormal protrusion of one or both eyeballs |
| nystagmus | involuntary, rapid, oscillating movement of the eyeball |
| photophobia | extreme sensitivity to, and discomfort from, light |
| scotoma | blind spot in vision |
Created by:
HannahLCobb
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