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11 Cards in this Set

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Cornea
The transparent convex anterior portion of the outer fibrous coat of the eyeball that covers the iris and the pupil and is continuous with the sclera.
Iris
The pigmented, round, contractile membrane of the eye, suspended between the cornea and lens and perforated by the pupil. It regulates the amount of light entering the eye.
Pupil
The apparently black circular opening in the center of the iris of the eye, through which light passes to the retina.
Lens
A transparent, biconvex body of the eye between the iris and the vitreous humor that focuses light rays entering through the pupil to form an image on the retina.
Optic Nerve
Either of the second pair of cranial nerves that arise from the retina and carry visual information to the thalamus and other parts of the brain.
Near Sightedness
Unable to see distant objects clearly
Far Sightedness
Abnormal condition in which vision for distant objects is better than for near.
Retina
A delicate, multilayered, light-sensitive membrane lining the inner eyeball and connected by the optic nerve to the brain.
Cataracts
Opacity of the lens or capsule of the eye, causing impairment of vision or blindness.
Glaucoma
Any of a group of eye diseases characterized by abnormally high intraocular fluid pressure, damaged optic disk, hardening of the eyeball, and partial to complete loss of vision.
Astigmatism
A visual defect in which the unequal curvature of one or more refractive surfaces of the eye, usually the cornea, prevents light rays from focusing clearly at one point on the retina, resulting in blurred vision.