Excimer laser

Excimer laser
A laser that emits very concentrated light in the ultraviolet (UV) region of the spectrum. Excimer lasers are used in medicine. For examples, In ophthalmology — to vaporize part of the surface layer of the cornea and thus reshape the cornea to correct refractive errors from myopia (nearsightedness), hyperopia (farsightedness), and astigmatism. In dermatology — to treat psoriasis and vitiligo. Technical Note: An excimer laser uses a noble-gas halide. "Excimer" is a chemical term that refers to a substance formed by the joining of two atoms or two molecules of the same chemical composition in an excited state; it is an excited dimer.

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excimer laser n a laser that uses a compound of a halogen and a noble gas to generate radiation usu. in the ultraviolet region of the spectrum

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a laser that can remove very thin sheets of tissue from the surface of the cornea of the eye. This can be done to alter the curvature of the corneal surface, for example to treat long- or short-sightedness (see LASEK, LASIK), or to remove diseased (e.g. calcified) tissue from the corneal surface. See keratectomy.

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[excited dimer] a laser with rare gas halides as the active medium whose beam is in the ultraviolet spectrum and penetrates tissues only a small distance; the beam breaks chemical bonds instead of generating heat to destroy tissue. Used in ophthalmologic and dermatologic procedures and in laser angioplasty.

Medical dictionary. 2011.

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Look at other dictionaries:

  • excimer laser — [ek′sə mər] n. a type of gas laser that emits powerful pulses of ultraviolet radiation used in weapons, industrial, or medical research: this radiation is emitted as the short lived excimers, dimeric molecules that can only exist when a component …   Universalium

  • excimer laser — [ek′sə mər] n. a type of gas laser that emits powerful pulses of ultraviolet radiation used in weapons, industrial, or medical research: this radiation is emitted as the short lived excimers, dimeric molecules that can only exist when a component …   English World dictionary

  • Excimer laser — An excimer laser (sometimes, and more correctly, called an exciplex laser) is a form of ultraviolet laser which is commonly used in eye surgery and semiconductor manufacturing. The term excimer is short for excited dimer , while exciplex is short …   Wikipedia

  • Excimer-Laser — Excimerlaser erzeugen elektromagnetische Strahlung im ultravioletten Wellenlängenbereich. Anwendungsbeispiele sind z. B. die operative Korrektur der Kurzsichtigkeit und die Fotolithografie (Mikrolithographie), zur Herstellung hochintegrierter… …   Deutsch Wikipedia

  • Excimer-Laser — eksimerinis lazeris statusas T sritis radioelektronika atitikmenys: angl. excimer laser vok. Excimer Laser, m rus. эксимерный лазер, m pranc. laser à excimères, m …   Radioelektronikos terminų žodynas

  • excimer laser — eksimerinis lazeris statusas T sritis radioelektronika atitikmenys: angl. excimer laser vok. Excimer Laser, m rus. эксимерный лазер, m pranc. laser à excimères, m …   Radioelektronikos terminų žodynas

  • excimer laser etching — ėsdinimas eksimeriniu lazeriu statusas T sritis radioelektronika atitikmenys: angl. excimer laser etching vok. Excimer Laserätzen, n rus. травление с эксимерным лазером, n pranc. décapage à laser à excimères, m …   Radioelektronikos terminų žodynas

  • excimer laser — noun Etymology: excited + dimer Date: 1973 a laser that uses a noble gas halide to generate radiation usually in the ultraviolet region of the spectrum …   New Collegiate Dictionary

  • excimer laser — a laser that can remove very thin sheets of tissue from the surface of the cornea of the eye. This can be done to alter the curvature of the corneal surface, for example to treat long or short sightedness (see LASEK, LASIK), or to remove diseased …   The new mediacal dictionary

  • excimer laser — noun : a laser that uses a noble gas halide to generate radiation usually in the ultraviolet region of the spectrum …   Useful english dictionary

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