Keratectomy

Removal of part of the cornea. This can be done by surgical excision or by laser. One such laser procedure is PRK (photorefractive keratectomy).
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An operation done to change the refraction of the cornea; a crescentic piece of corneal stroma is removed and the resultant corneal wound is sutured. This steepens the cornea and increases its power in that axis. SEE ALSO: keratotomy. [kerato- + G. ektome, excision]
- automated lamellar k. resection of a disk of corneal tissue using a precise machine to alter the refractive power of the eye.
- photorefractive k. (PRK) removal of part of the cornea with a laser to change its shape, and thus to modify the refractive error of the eye (reduce its myopia, for example).
- phototherapeutic k. (PTK) ablation of diseased corneal tissue using an excimer laser.

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ker·a·tec·to·my .ker-ə-'tek-tə-mē n, pl -mies surgical excision of part of the cornea see photorefractive keratectomy

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n.
an operation in which a part of the cornea is removed, usually a superficial layer. This procedure is now frequently done by an excimer laser, either to correct refractive errors (myopia, hypermetropia), by reshaping the surface of the cornea (photorefractive keratectomy; PRK), or to remove diseased corneal tissue (phototherapeutic keratectomy). See also automated lamellar keratectomy.

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ker·a·tec·to·my (ker″ə-tekґtə-me) [kerat- + ectomy] excision of a portion of the cornea, usually done for anterior staphyloma.

Medical dictionary. 2011.

Look at other dictionaries:

  • keratectomy — [ker΄ə tek′tə mē] n. pl. keratectomies [ KERAT(O) + ECTOMY] the surgical removal of part or all of the cornea …   English World dictionary

  • keratectomy — n. an operation in which a part of the cornea is removed, usually a superficial layer. This procedure is now frequently done by an excimer laser, either to correct refractive errors (myopia, hypermetropia), by reshaping the surface of the cornea… …   The new mediacal dictionary

  • keratectomy — ˌkerəˈtektəmē noun ( es) Etymology: kerat + ectomy : surgical excision of part of the cornea see photorefractive keratectomy herein * * * keratectomy see kerato …   Useful english dictionary

  • keratectomy — noun (plural mies) Date: 1871 surgical excision of part of the cornea compare photorefractive keratectomy …   New Collegiate Dictionary

  • keratectomy — /ker euh tek teuh mee/, n., pl. keratectomies. Surg. excision of part of the cornea. [1870 75; KERAT + ECTOMY] * * * …   Universalium

  • keratectomy — noun An operation that removes part of the cornea, as in keratomileusis …   Wiktionary

  • keratectomy — n. surgical removal of part of the cornea (Surgery) …   English contemporary dictionary

  • keratectomy — [ˌkɛrə tɛktəmi] noun surgical removal of a section or layer of the cornea, usually performed using a laser to correct myopia …   English new terms dictionary

  • keratectomy — ker·a·tec·to·my …   English syllables

  • Keratectomy, photorefractive (PRK) — A kind of laser eye surgery designed to change the shape of the cornea to eliminate (or reduce) the need for glasses and contact lenses. The laser is used to remove the outer layer of the cornea and flatten the cornea. The flattening of the… …   Medical dictionary

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