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Eye Related Terms

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  • Accommodation

  • The ability of the eye to focus objects closer than optical infinity, approx. 20 ft (6m)

  • Accommodative insufficiency

  • Loss of or less than age expected normal amounts of accommodation

  • Adnexa

  • The accessory structures of the eye, including the eyelids, lacrimal apparatus, etc.

  • ALK-Laser

  • Automated lamellar keratoplasty (removal of a part of the central corneal epithelium) combined with excimer laser PRK to effect a change on the refractive error

  • Amblyopia

  • Often called "lazy eye" it is a unilateral (occasionally bilateral) condition in which the best corrected vision is poorer than 20/20 (6/6) in the absence of any obvious structural anomalies or ocular disease

  • Amsler grid

  • A hand held chart featuring horizontal and vertical lines, usually white on black background, used to test for central visual field defects.

  • Anterior ocular segment

  • The part of the eye anterior to the crystalline lens, including the cornea, anterior chamber, iris and ciliary body

  • Antioxidants

  • Micronutrients which destroy or neutralize free radicals, molecules which have been implicated as one causative factor in the stimulation of abnormal cellular reproduction (cancer) and cellular destruction (aging).

  • Aqueous

  • The watery fluid produced by tissues inside the eye and which fills the forward chamber of the eye.

  • ARMD age related macular degeneration

  • Destruction and loss of the photoreceptors in the macula region of t he retina resulting in decreased central vision and, in advanced cases, blindness

  • Astigmatism

  • A refractive anomaly caused by unequal refraction of light in different meridians, resulting in a distorted and blurred image.

  • Automated perimeter

  • A computer-driven device used to plot defects in the visual field. Usuallly this is a large hemisphere shell into which the patient's head is placed. Various points of lights, sometimes of different sizes, intensities and colors are projected onto the screen. The patient then indicates whether the light is seen and the response is recorded. The computer then plots the effective visual thresholds within the targeted visual field.

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Common Eye Terms

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