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Contacts Term 1

Terminology Quiz 1

Abrasion Scraped area of corneal surface accompanied by loss of superficial tissue.
Accomodation The ability of the crystalline lens to adjust power to provide retinal focus of images of objects closer than infinity.
Acuity Measure of an eyes ability to distinguish object details and shape. Assessed by the smallest identifiable object that can be seen at a specified distance (usually 20 ft or 16 in)
Adnexia Oculi Structures surrounding the eyeball, includes the eyelids, eyebrows, tear drainage system, orbital walls, and orbital contents
Albinism Lack of pigment in the iris and choroid, results in reddish pupils and iris; usually accompanied by poor vision, light sensitivity, and involuntary oscillating eye movements
Amblyopia Loss of vision without any apparent disease of the eye; decreased vision without detectable anatomical damage to the retina on visual pathways.
Ametropia A refractive error in which the eye, when in a state of rest, does not focus the image of an object upon the retina. Includes hyperopia, myopia, and astigmatism.
Aniridia (Iris hypoplasia); Incomplete formation of the iris; associated with glaucoma, nystagmus, sensitivity to light, and poor vision
Aniseikonia Unequal retinal image sizes in the two eyes, usually from different refractive errors
Anisicoria Unequal pupil size (difference of 1 mm or more)
Anomaly A deviation from normal, especially of a body part
Anophthalmia Absence of the eyeball
Anterior Chamber Fluid-filled space inside the eye between the iris and the innermost corneal surface.
Antigen Any substance that stimulates production of antibodies; part of the immune system.
Aphakia Absence of the eyes crystalline lens.
Aqueous Humor Clear, watery fluid that fills the space between the back surface of the cornea and the front surface of the vitreous, bathing the lens. Produced by the ciliary processes; nourishes the cornea, iris, and the lens and maintains intraoccular pressure.
Arcus Senilis Ring-shaped, grayish deposit of fat near the limbus. Typically occurs after age 60, or in young patients with abnormally high blood fat levels.
Created by: griffiskr