LASIK stands for Laser In-Situ Keratomileusis which means using a laser underneath a corneal flap (in situ) to reshape the cornea (keratomileusis). It is a popular surgical procedure to correct vision of persons who are suffering from conditions like nearsighted, farsighted or have astigmatism.
A highly specialized laser known as the excimer laser is used to surgically correct refractive errors, improve vision and reduce or eliminate the need for glasses or contact lenses. The transparent front covering of the eye is known as the cornea and the LASIK procedure is performed to change the shape of the cornea.
In the human eyes, the front portion cornea/lens focusses the incoming light on the surface of the retina which is situated on the rear part of the eye. In case of normal eyes, the image gets focussed exactly on the retina and any mismatch in the system is called a refractive error. There are generally three types of refractive errors - myopia (nearsightedness), hyperopia (farsightedness) and astigmatism.
During the procedure, numbing drops are used therefore this procedure is associated with very little pain, no bandages or stitches are required and it results in a dramatic reduction in eyeglass or contact lens dependence. However, it is a complex technical procedure and should be performed by expert surgeons only. In rare cases, it may result in complications also.
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