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radial keratotomy

noun, Ophthalmology
1.
a surgical technique for correcting nearsightedness by making a series of spokelike incisions in the cornea to change its shape and focusing properties.
Origin
1975-1980
1975-80; kerato- + -tomy
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for radial keratotomy

radial keratotomy

/ˌkɛrəˈtɒtəmɪ/
noun
1.
an operation designed to improve short-sightedness in which a number of cuts are made around the cornea to change the shape of it
Word Origin
C20: from kerato- + -tomy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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radial keratotomy in Medicine

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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radial keratotomy in Science
radial keratotomy
  (kěr'ə-tŏt'ə-mē)   
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 Article for 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.

Learn more about radial keratotomy with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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