The full form of LASIK is tia laze Assisted in Situ Keratomileusis.

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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 isitu keratomileusis.

Before LASIK, the most common size of laze 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 lớn be very painful & can take weeks. Furthermore, both eyes cannot be treated at the same time and the patient must wait several months between treatments khổng lồ allow each eye to lớn recover sufficiently.

LASIK is an ambulatory procedure done in an ophthalmology office or clinic. Numbing eye drops are used. The eyelids are held xuất hiện 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 và the preprogrammed tia laze then reshapes the inner cornea khổng lồ 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 đôi mươi minutes to vì 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 lớn person but has been likened to lớn the sensation of having worn tương tác 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 lớn 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 lớn know that hormonal changes in pregnancy affect the cornea’s shape và density and can complicate both the healing process and the success of LASIK. Women who plan lớn become pregnant within 6 months of LASIK surgery should not have the procedure done.

Laser‐assisted in‐situ keratomileusis (LASIK) is a surgical procedure that corrects refractive errors. This technique creates a flap of the outermost parts of the cornea (epithelium, bowman layer, and anterior stroma) to expose the middle part of the cornea (stromal bed) và reshape it with excimer laser using photoablation. The flaps can be created by a mechanical microkeratome or a femtosecond laser.


To compare the effectiveness & safety of mechanical microkeratome versus femtosecond tia laze in LASIK for adults with myopia.

Search methods

We searched CENTRAL (which contains the Cochrane Eyes và Vision Trials Register) (2019, Issue 2); Ovid MEDLINE; Embase; PubMed; LILACS; ClinicalTrials.gov và the World Health Organization (WHO) International Clinical Trials Registry Platform (ICTRP). We used no date or language restrictions. We searched the reference lists of included trials. We searched the electronic databases on 22 February 2019.

Xem thêm: Lấy Chồng Từ Thuở Mười Ba Đến Năm Mười Tám, Lấy Chồng Từ Thuở Mười Ba (Khuyết Danh Việt Nam)

Selection criteria

We included randomized controlled trials (RCTs) of LASIK with a mechanical microkeratome compared khổng lồ a femtosecond laser in people aged 18 years or older with more than 0.5 diopters of myopia or myopic astigmatism.