Glossary

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  1. Aberration controlled lens

    Contact lens to improve visual performance by the control of spherical aberration.

  2. Acanthamoeba keratitis

    A rare but serious sight-destroying inflammation of the cornea caused by a parasite found in contaminated water.

  3. Accommodation

    Changing the focusing power of the eye by altering the shape of the eyes crystalline lens to focus light from near objects onto the retina to give clear vision at that distance.

  4. Aesthesiometer

    Instrument for measuring the sensitivity of the cornea or lid margins.

  5. Alignment fitting

    Fitting technique where the *BOZR is selected to be parallel to the corneal surface.

  6. Amblyopia

    Diminished vision in one or both eyes without pathology of ocular structures, and despite best spectacle or contact lens correction. Is a lack of development, mentally, in the part of the brain that corresponds to a particular eye.

  7. Anoxia

    The absence of oxygen

  8. Apex of cornea

    The peak of the cornea, normally located directly over the pupil and visual axis

  9. Aphakia

    Absence or loss of the eye's natural crystalline lens, as after cataract removal.

  10. Apical clearance

    The distance between the posterior surface of a contact lens and the apex of the cornea.

Displaying 1 - 10 of 238 Terms
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