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Chapter 5
The Eye
| Term | Definition |
|---|---|
| optic nerve | nerve responsible for carrying impulses for the sense of sight from the retina to the brain |
| contact lens | small, plastic, curved disk with optical correction that fits over the cornea |
| lacrimal gland | gland located in the upper outer region above the eyeball that secretes tears |
| posterior chamber | space between the back of the iris and the front of the vitreous chamber; filled with aqueous humor |
| diplopia | double vision |
| blepharochalasis | baggy eyelid; overabundance and loss of skin elasticity on the upper eyelid |
| ciliary body | ring of tissue behind the peripheral iris that is composed of ciliary muscle and ciliary processes |
| dacry/o | combining form meaning tear |
| macular degeneration | breakdown or thinning of the tissues in the macula, resulting in partial or complete loss of central vision |
| keratitis | inflammation of the cornea |
| ptosis | drooping of the eyelid; usually caused by paralysis |
| vitre/o | combining form meaning glassy |
| irid/o | combining form meaning iris which is the colored part of eye |
| fluorescein angiography | visualization and photography of retinal and choroidal vessels made as fluorescein dye |
| phacoemulsification | use of ultrasound to shatter and break up a cataract, with aspiration and removal |
| scleral buckling | surgery to treat retinal detachment by placing a band of silicone around the sclera to cinch it toward the middle of the eye |
| scleral venous sinus | duct in the anterior chamber that carrier filtered aqueous humor to veins and bloodstream |
| ectropion | outward turning of the rim of the eyelid |
| IOL | abbreviation for intraocular lens |
| pupil | black, circular opening in the center of the iris through which light passes as it enters the eye |
| Sclera | tough, fibrous, white outer coat extending from the cornea to the optic nerve |
| meibomian glands | oil glands located along the rim of the eyelids |
| retin/o | combining form meaning retina |
| distance visual acuity | measure of the ability to see the details and shape of identifiable objects from a specified distance |
| conjunctiva | mucous membrane that lines the eyelids and outer surface of the eyeball |
| heterotropia | a condition of eye misalignment cased by intraocular muscle imbalance |
| lacrim/o | combining form meaning tear (liquid from eye) |
| glaucoma | group of diseases of the eye characterized by increased intraocular pressure that results in damage to the optic nerve |
| miotic | agent that causes the pupil to contract |
| ophthalmoscopy | use of an ophthalmoscope to view the interior of the eye |
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