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51 Cards in this Set
- Front
- Back
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Oculus Dexter |
Right eye, O.D. |
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Oculus sinister |
Left eye, O.S. |
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Oculus Uterque |
Both eyes, O.U. |
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Globe |
Correct name for eyeball. |
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Antero-posterior diameter of the globe |
24mm |
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Bony cavity/socket that houses the eye |
Orbit |
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Protects the eye and provides a structure for the attachment of the ocular muscles |
Orbit |
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Where the upper and lower eyelids meet |
Canthus |
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"White of the eye" |
Sclera |
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White tissue that covers the surface of the globe. |
Sclera |
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Protects and shapes the eye |
Sclera |
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Transparent structure on the front surface of the globe. |
Cornea |
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Has .58mm thick center, and 1mm thick at periphery |
Cornea |
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Has five different layers |
Cornea |
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Folds of skin thay serve as protective coverings for the globe and cornea. |
Eyelids |
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Regulate incoming light |
Eyelids |
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Thin transparent mucous membrane that lines the posterior surface of the lids |
Conjunctiva |
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"Shutter-like" muscle that forms the colored part of the eye |
Iris |
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Controls the amount of light entering the eye |
Iris |
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Opening of the iris |
Pupil |
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Dilates in dim light, constricts in bright light |
Pupil |
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Watery substance that fills the anterior and posterior chambers |
Aqueous humor |
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Maintains the shape of these chambers, thus regulating the eyes intraocular pressure |
Aqueous humor |
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Supplies the crystalline lens & cornea w/ nutrients |
Aqueous humor |
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Constantly being replaced and drains through the Canal of Schlemm |
Aqueous humor |
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Controls the focusing power (accommdation) of the eye by changing the shape of the crystalline lens |
Ciliary Muscle |
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Resilient, transparent structure in the eye that focuses light by changing its front surface curvature |
Crystalline lens |
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Located near the front of the eye, directly behind the pupil |
Crystalline lens |
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Biconvex shape |
Crystalline lens |
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Tissue membrane thay covers the inside back of the eye |
Retina |
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Contains 10 layers of nerve endings as well as rods and cones |
Retina |
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Light receptor cells that send visual impulses to the brain via the optic nerve |
Rods & Cones |
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Enables the eye to see at night |
Rods |
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Gives the eye color perception |
Cones |
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Sends impulses from the retina to the brain for interpretation as visual images |
Optic nerve |
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Located on the retina |
Macula |
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Contains only visual receptor cells and, therefore, is the location of the most acute vision |
Fovea |
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Layer of blood vessels in the back of the eye between the sclera and the retina |
Choroid |
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Nourishes the retina |
Choroid |
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Jelly-like substance found between the back of the crystalline lens and the retina |
Vitreous humor |
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Maintains the eyes proper shape and temperature |
Vitreous humor |
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Margin at which the cornea and sclera meet |
Limbus |
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How many eye muscles that the eye moves in different directions |
6 |
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Light rays converge on retina, eye has no refractive error. Eye is considered normal, requires no corrective lens. |
Emmetropia |
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Needs some type of correction, light rays entering the eye do not come to a point of focus on retina. |
Ametropia |
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Significantly, unequal refractive error in the two eyes. |
Anisometropia |
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One eye is myopic, and the other eye is hyperopic |
Antimetropia |
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Reduction in visual acuity that cannot be corrected by a lens. Also known as "lazy eye" (needs to be treated w/ occluder lenses) |
Amblyopia |
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Two diff images are formed on the retina. Also knkwn as "Double Vision" |
Diplopia |
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Caused by a muscle imbalance that prohibits binocular vision, known as "cross eyed" |
Strabismus |
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Abnormal sensitivity or intolerance of light |
Photophobia |
