Various surgical procedures (LASIK, PRK, IOL) are employed depending on the patient’s condition (degree and type of refractive error, corneal thickness, quality and shape of cornea, state of the retina etc.), and the extensive preoperative examination is crucial for the problem to be accurately defined and the right solution to be reached. LASIK can correct short-sightedness of up to -12 dioptres, where as far-sightedness and cylindrical vision can be corrected up to +6 dioptres, which is determined by the thickness of the cornea.