LASIK (laser-assisted in situ keratomileusis), commonly refers to as laser eye surgery or laser vision correction problems. It is a type of refractive surgery for the correction of myopia, hyperopia, and astigmatism. LASIK surgeries are performed by ophthalmologists and they uses a laser or microkeratome to reshape the eye's cornea in order to improve visual acuity. LASIK provides a long-lasting alternative to eyeglasses or contact lenses for more number of people. LASIK is most similar to another surgical corrective procedure, photorefractive keratectomy (PRK), and LASIK. All represents advances and innovations over radial keratotomy in the surgical treatment of refractive errors of vision. The patients with moderate to high myopia or thin corneas cannot be treated with LASIK and PRK. Phakic intraocular lens is an alternative one for those patients. Ophthalmologists who are undertaking photorefractive (laser) surgery for the correction of refractive errors or other eye errors during surgeries should ensure that patients understand the benefits and potential risks of the procedure. Due to these refractive errors the causes includes such as failure to achieve the expected improvement in unaided vision, development of new visual disturbances, corneal infection and flap complications. These risks should be detected against those of wearing spectacles or contact lenses.