Laser-assisted in situ keratomileusis
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 in cases of severe myopia (nearsightedness). The procedure is best known as LASIK, an acronym for laser-assisted in situ keratomileusis. Before LASIK, the most common form of laser eye surgery was a treatment called PRK which involved scraping away the surface cells of the cornea before reshaping it with the laser. Unfortunately, the healing process after PRK tends to be very painful and can take weeks. Furthermore, both eyes cannot be treated at the same time and the patient must wait several months between treatments to allow each eye to recover sufficiently. LASIK is an ambulatory procedure done in an ophthalmology office or clinic. Numbing eye drops are used. The eyelids are held open so that there is no interference with the laser. The ophthalmologist creates an ultrathin flap on the front of the eye with a precise automated instrument. The flap is gently lifted and the preprogrammed laser then reshapes the inner cornea to refocus the eye. The flap is repositioned and holds itself in place, healing naturally without the need for any stitches. The laser pulses last on the average between 30 and 60 seconds. In all, LASIK takes about 20 minutes to do both eyes. The procedure is without much pain and recovery is quick. One may experience some mild discomfort and watering of the eyes after treatment. This varies from person to person but has been likened to the sensation of having worn contact lenses for too long. The risks associated with LASIK also include a small but real risk of an infection in the eye. No eye patch need be worn after LASIK. LASIK is now coming into use also to treat hyperopia (farsightedness) and astigmatism. LASIK does not treat or prevent age-related long-sight (presbyopia), which is due to the decreasing flexibility of the eye's lens that almost all of us experience as we approach our fifties and need to wear reading glasses. Women considering LASIK need to know that hormonal changes in pregnancy affect the cornea's shape and density and can complicate both the healing process and the success of LASIK. Women who plan to become pregnant within 6 months of LASIK surgery should not have the procedure done.

Medical dictionary. 2011.

Look at other dictionaries:

  • laser-assisted in-situ keratomileusis — la·ser as·sist·ed in situ keratomileusis lā zər ə sis təd n LASIK * * * keratoplasty in which the excimer laser and microkeratome are combined for vision correction; the microkeratome is used to shave a thin slice and create a hinged flap in the… …   Medical dictionary

  • laser-assisted in situ keratomileusis — noun a refractive surgery procedure that reshapes the cornea • Syn: ↑LASIK • Hypernyms: ↑eye operation, ↑eye surgery …   Useful english dictionary

  • Laser acronyms — Here, is a list of acronyms used in laser physics, applications and technology.A*AOM – acousto optic modulator *APD – avalanche photodiode *APM – additive pulse mode locking *ASE – amplified spontaneous emission *AWG – arrayed waveguide… …   Wikipedia

  • Laser excimère — Lasik La technique du Lasik (LAser in Situ Keratomileusis) est une intervention chirurgicale de l œil. Son principe consiste à découper une fine lamelle dans l épaisseur de la cornée (qui est la partie transparente de la surface de l oeil) afin… …   Wikipédia en Français

  • keratomileusis — Surgical alteration of refractive error by changing the shape of a deep layer of the cornea : the anterior lamella is peeled back, frozen, and recarved on its back surface on a …   Medical dictionary

  • In situ — (lat. für „am (Ursprungs ) Ort“, „am Platz“, „an Ort und Stelle“) ist ein lateinischer Begriff, der als Fachbegriff in unterschiedlichen Disziplinen verwendet wird. Gegenteil zu in situ ist ex situ (außerhalb des (Ursprungs )Ortes). Allgemein… …   Deutsch Wikipedia

  • Lasik tout laser — Lasik La technique du Lasik (LAser in Situ Keratomileusis) est une intervention chirurgicale de l œil. Son principe consiste à découper une fine lamelle dans l épaisseur de la cornée (qui est la partie transparente de la surface de l oeil) afin… …   Wikipédia en Français

  • LASIK — • laser assisted in situ keratomileusis …   Dictionary of medical acronyms & abbreviations

  • LASIK — Laser Assisted In Situ Keratomileusis Contributor: MSFC …   NASA Acronyms

  • LASIK — or Lasik ( laser assisted in situ keratomileusis ) is a type of refractive laser eye surgery performed by ophthalmologists for correcting myopia, hyperopia, and astigmatism. [ [http://www.intelihealth.com/IH/ihtIH/WSS/9339/32123.html LASIK. ]… …   Wikipedia

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