radial keratotomy

radial keratotomy

noun Ophthalmology.
a surgical technique for correcting nearsightedness by making a series of spokelike incisions in the cornea to change its shape and focusing properties.

Origin:
1975–80; kerato- + -tomy

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Collins
World English Dictionary
radial keratotomy (ˌkɛrəˈtɒtəmɪ)
 
n
an operation designed to improve short-sightedness in which a number of cuts are made around the cornea to change the shape of it
 
[C20: from kerato- + -tomy]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

radial keratotomy n.
Surgical modification of corneal curvature to correct myopia by making symmetrical incisions into but not through the cornea.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
radial keratotomy   (kěr'ə-tŏt'ə-mē)  Pronunciation Key 
A surgical procedure consisting of a radial pattern of corneal incisions, performed to reduce or correct myopia.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

radial keratotomy

surgical procedure to correct myopia (nearsightedness) by reducing the radius of curvature of the cornea and astigmatism (asymmetrical curvature of the cornea). A series of 4 to 8 equally spaced deep cuts are made in the peripheral cornea, leaving the central cornea above the pupil clear. Intraocular pressure then pushes the weakened central cornea outward, flattening it and modifying its refractive power. Wound contraction during healing also affects corneal curvature by exerting radial tension on the uncut area.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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