As it name indicates, laser eye surgery is an operation, in which laser beam is employed for treatment. If one suffers from myopia, his cornea becomes very high. Then, the laser can cut some parts of the eye tissues, making the cornea flat and even. On the contrary, people who suffer from farsightedness usually have too flat cornea. As for this, laser can be used to extract some other tissues onto it. As for astigmatism, the laser can be used to flatten the uneven tissues around the cornea.