There are several different types of laser eye surgery. And there are different types of lasers that can be used in eye surgery depending upon what the surgeon is wanting to accomplish. For instance, the surgeon could use a yag laser to treat secondary cataracts. Or the surgeon could use an argon laser to perform iridotomies or possibly to treat leaking blood vessels in the retina. Or the surgeon could use an excimer laser to correct vision disorders such as near sightedness, farsightedness, or astigmatism. This is the laser you are probably referring to. Now, excimer laser surgery is a broad term that can include PRK (photorefractive keratectomy) or LASIK (laser insitu keratomeleusis). PRK is used on the surface of the cornea to correct prescription errors whereas LASIK is used, after creating a flap, on the internal structures of the cornea. Both are capable of precisely correcting prescription errors. To decide which is best for you, you need to see an eye doctor who is experienced in this field. He or she will be able to recommend which procedure would be best.