Intraocular lens
The clouded (cataractous) lens is best removed in its entirety by surgery and replaced with an intraocular lens (IOL) made of plastic, an operation that takes about an hour and usually does not need hospitalization. Cataract surgery was first done in India in the 5th century BC by a surgeon named Susruta who did a procedure called couching (or reclination) in which the clouded lens is pushed into the back of the eye, permitting better but by no means normal vision. Couching was still done in some countries until the mid-20th century. The first description of the cataract and its treatment In the West was in 29 AD by the Latin encyclopedist Celsus who performed the practice of needling (also called discission) of cataracts to break up the cataract into smaller particles to facilitate their absorption. Modern cataract surgery was first done in1748 in France by Jacques Daviel who removed the cataract from the lens. Today, the IOL is now usually the best type of cataract surgery.

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(IOL) an artificial lens inserted into the lens capsule after cataract removal.

Medical dictionary. 2011.

Look at other dictionaries:

  • Intraocular lens — An intraocular lens (IOL) is an implanted lens in the eye, usually replacing the existing crystalline lens because it has been clouded over by a cataract, or as a form of refractive surgery to change the eye s optical power. It usually consists… …   Wikipedia

  • intraocular lens — noun an artificial lens that is implanted into the eye of someone to replace a damaged natural lens or someone who has had a cataract removed • Hypernyms: ↑lens, ↑lense, ↑lens system * * * Ophthalm. a plastic lens implanted surgically to replace… …   Useful english dictionary

  • intraocular lens — Ophthalm. a plastic lens implanted surgically to replace the eye s natural crystalline lens, usually because the natural lens has developed a cataract. Also called permanent lens. Cf. contact lens. * * * …   Universalium

  • intraocular — [in΄trə äk′yo͞o lər] adj. located within, or surgically implanted into, an eyeball [intraocular pressure, intraocular lens] …   English World dictionary

  • Intraocular — In the eye. The intraocular pressure is the pressure within the eye. * * * Within the eyeball. * * * in·tra·oc·u·lar .in trə äk yə lər, (.)trä adj implanted in, occurring within, or administered by entering the eyeball <intraocular… …   Medical dictionary

  • Lens, intraocular — The clouded (cataractous) lens is best removed in its entirety by surgery and replaced with an intraocular lens (IOL) made of plastic, an operation that takes about an hour and usually does not need hospitalization. Cataract surgery was first… …   Medical dictionary

  • Lens (anatomy) — Crystalline lens (anatomy) Light from a single point of a distant object and light from a single point of a near object being brought to a focus by changing the curvature of the lens …   Wikipedia

  • intraocular — adj. of or relating to the area within the eyeball. An intraocular lens implant is a plastic lens placed inside the eye after cataract extraction to replace the natural lens …   The new mediacal dictionary

  • lens system — noun a transparent optical device used to converge or diverge transmitted light and to form images • Syn: ↑lens, ↑lense • Hypernyms: ↑optical device • Hyponyms: ↑anastigmat, ↑anastigmatic lens, ↑ …   Useful english dictionary

  • Lens — The transparent structure inside the eye that focuses light rays onto the retina (the nerve layer that lines the back of the eye, senses light and creates impulses that go through the optic nerve to the brain). The lens was named after the lentil …   Medical dictionary

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