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Chp.5
The eye
| Term | Definition |
|---|---|
| blephar/o | eyelid |
| aqua/o | water |
| ir/o | iris, colored part of eye |
| kerat/o | cornea |
| lacrim/o | tear |
| ocul/o | eye |
| phot/o | light |
| retin/o | retina |
| scler/o | hard or sclera |
| -opia | vision condition |
| 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 |
| choroid | vascular layer beneath the sclera that provides nourishment to the outer portion of the retina |
| ciliary muscle | smooth muscle portion of the ciliary body, which contracts to assist in near vision |
| conjunctiva | mucous membrane that lines the eyelids and outer surface of the eyeball |
| Cornea | transparent anterior portion of the outer covering of the eye |
| eyelid | movable, protective fold that opens and closes, covering the eye; also called palpebra |
| fovea centralis | pinpoint depression in the center of the macula lutea that is the site of sharpest vision |
| 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 |
| meibomian glands | oil glands located along the rim of the eyelids |
| iris | colored circle |
| lacrimal gland | gland located in the upper outer region above the eyeball that secretes tears |
| lacrimal ducts | tubes that carry tears to the lacrimal sac |
| Lacrimal sac | structure that collects tears before emptying into the nasolacrimal duct |
| lens capsule | capsule that encloses the lens |
| optic disc | exit site of retinal nerve fibers as well as entrance point for retinal arteries and exit point for retinal veins |
| pupil | black, circular opening in the center of the iris through which light passes as it enters the eye |
| retina | innermost layer that perceives and transmits light to the optic nerve |
| Cones | cone-shaped cells within the retina that are color sensitive and respond to bright light |
| Rods | rod-shaped cells within the retina that respond to dim light |
| Sclera | tough, fibrous, white outer coat extending from the cornea to the optic nerve |
| vitreous | jelly-like mass filling the inner chamber between the lens and retina that gives bulk to the eye |
| asthenopia | eyestrain (asthenia = weak condition) |
| blepharospasm | involuntary contraction of the muscles surrounding the eye causing uncontrolled blinking and lid squeezing |
| diplopia | double vision |
| exophthalmos | abnormal protrusion of one or both eyeballs; also spelled exophthalmos |
| lacrimation | secretion of tears |
Created by:
kdavis0318
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