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Med Term Ch 5
Term | Definition |
---|---|
Choroid | pigmented vascular layer between sclera and retina |
Conjunctiva | mucous membrane lining the eyelids and outer eye surface |
Rods and cones | visual receptors (neurons) in retina that respond to the light waves |
blephar/o - | eyelid |
cycl/o | circle, ciliary body |
dacry/o | tear |
ocul/o, opt/o, ophthalm/o | eye |
kerat/o | cornea |
aphakia | absence of the lens, usually after cataract extraction |
presby/o | old age |
mydriatic | agent that causes dilation of the pupil; used for certain eye examinations |
phot/o | light |
phac/o, phak/o | lens (lentil) |
lacrim/o | tear |
cryoretinopexy | use of intense cold to seal a hole or tear in the retina; used to treat retinal detachment |
vitre/o | glassy |
opia (suffix) | condition of vision |
IOL | intraocular lens |
LASIK laser | assisted in situ keratomileusis |
anterior chamber | fluid-filled space between the cornea and iris |
scleral venous sinus | duct in the anterior chamber that carrier filtered aqueous humor to veins and bloodstream; also called canal of Schlemm |
choroid | vascular layer beneath the sclera that provides nourishment to the outer portion of the retina |
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 |
macula lutea | central region of the retina; responsible for central vision; yellow pigment provides its color |
trabecular meshwork | mesh-like structure in the anterior chamber that filters the aqueous humor as it flows into the canal of Schlemm |
nystagmus | involuntary, rapid, oscillating movement of the eyeball |
cycloplegic | agent that paralyzes the ciliary muscle and the powers of accommodation; commonly used in pediatric eye examination |