Through the years laser corrected vision surgery has evolved. Here is a great article I found on LASIK. In it you will learn what LASIK stands for and how it all works?
LASIK, or “laser-assisted in situ keratomileusis,” is the most commonly performed laser eye surgery to treat myopia (nearsightedness), hyperopia (farsightedness) and astigmatism.
Like other types of refractivesurgery , the LASIK procedure reshapes the cornea to enable light entering the eye to be properly focused onto the retina for clearer vision.
For more information please go to http://www.allaboutvision.com/visionsurgery/lasik.htm