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Opthalmic Fall 2013

Opthalmic Fall 2013 - Term Definition Accommodation...

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Term: Accommodation Definition: Adjustment of eye for seeing at different distances via lens changes Term: Age Related Macular Degeneration Definition: Leading cause of blindness, happens on elderly, disease of macular Term: Albinism Definition: Genetic condition, absence of pigment cels either throughout the body or restricted to the eye, may cause decreased vision, nystagmus (uncontrollable movements of the eyes), light sensitivity Term: Amaurosis Fugax Definition: Temporary blindness, often monocular (one eye)
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Term: Amblyopia Definition: Loss of vision without organic reason, uncorrected refractive error ( Term: Ametropia Definition: Any refractive error of the eye Term: Amsler Grid Definition: A chart with horizontal and vertical lines for testing macular distortion Term: Aneurysm Definition: An out-pouching sac in the artery as seen in diabetic retinopathy as a microaneurysm (protrusion) Term: Anaphylactic Shock Definition: State of collapse resulting from injection of a substance to which the person has become sensitized.
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Term: Angle-Fixated Lens Definition: Intraocular lenses surgically fixated in the angle of the anterior champer Term: Aniridia Definition: Congenital absence of iris Term: Anisocoria Definition: Difference of the diameter of the pupils Term: Anterior Chamber Definition: Distance between cornea and lens, shallow in narrow angle glaucoma. Term: Aphakia Definition: Absence of the crystalline lens of the eye
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Term: Applanation Tonomerty Definition: measure of pressure, force required to flatten a small area of the central cornea Term: Aqueous Humor Definition: Clear fluid that is secreted by the ciliary processes and fills the anterior and posterior chambers of eye. Term: Artifact Definition: Poor tech, or subject quality that degrades photographic image. Term: Asteroid Hyalosis Definition: Calcium deposits in the vitreous. Usually does not impair vision. Term: Astigmatism Definition: Refractive error that prevents light rays from coming to a single point of focus due to varying indices in different meridians.
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Term: Attenuation Definition: Narrowing of a vessel Term: Basal Cell Carcinoma Definition: Malignant lid tumor, has a characteristic appearance of a pit surrounded by raised pearly edges. Term: Bilateral Definition: Both sides of body Term: Binocular Vision Definition: Fuse one object from two eyes into one Term: Blepharitis Definition: Inflammation of the eyelids
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Term: Blindness Definition: 20/200 or less in the better eye after correction, or a visual field of less than 20-30 degrees. in the US Term: Blind Spot Definition: Site of optic disc where there are no photoreceptors Term: Blowout Fracture Definition: An injury due to blunt trauma, in which orbital bones are broken. Term: Bowman's Membrane Definition: Layer of cornea, between corneal epithelium and the corneal stroma, acts as an anchor for the corneal epithelium Term: Bulbar Conjunctiva Definition: The globe portion of the conjunctiva
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Term: Capsule Definition: A thin membrane that encloses the crystalline lens Term: Cataract Definition:
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