Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. the absence of the lens of the eye.

from the GNU version of the Collaborative International Dictionary of English

  • n. An anomalous state of refraction caused by the absence of the crystalline lens, as after operations for cataract. The remedy is the use of powerful convex lenses.

from The Century Dictionary and Cyclopedia

  • n. etc. See aphacia, etc.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. absence of the natural lens of the eye (usually resulting from the removal of cataracts)

Etymologies

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Examples

  • However people with aphakia (no lens, typically through removal for cataract) can see it, one being Professor Bill Stark of Saint Louis University.

    Beyond the visible

  • An estimated 20.5 million Americans aged 40 y (17.2% of that population) have cataract, 6.1 million (5.1%) have pseudophakia or aphakia, and it is predicted that those numbers will rise by 50% within 2 decades.

    Carbohydrates and cataracts | The Blog of Michael R. Eades, M.D.

  • Cataract removal procedure involves the removal of the crystalline lens which creates a condition called aphakia.

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  • Since the 1970s, contact lenses have been the standard way of treating aphakia (surgical lens removal to treat cataract), they said.

    Medindia Health News

  • These factors among others probably contribute to the poor visual outcome of many children with unilateral aphakia, "wrote the authors.

    Medindia Health News

Comments

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  • "When the lens becomes opaque due to cataracts, it may be surgically removed, and can be replaced with an artificial lens. Even with the lens removed (a condition known as aphakia) the patient can still see, as the lens is only responsible for about 30% of the eyes' focusing power.

    However, aphakic patients report that the process has an unusual side effect: they can see ultraviolet light. It is not normally visible because the lens blocks it. Some artificial lenses are also transparent to UV with the same effect. The receptors in the eye for blue light can actually see ultraviolet better than blue."

    -- http://www.guardian.co.uk/science/2002/may/30/medicalscience.research

    April 24, 2013