Today certain vision problems such as nearsightedness, farsightedness and astigmatism can be reduced or eliminated surgically. LASIK (laser assisted in situ keratomileusis) offers a number of benefits over other forms of laser vision correction because it is performed under a protective layer of corneal tissue. As a result, there is less surface area to heal, less risk of scarring, less risk of corneal haze, less postoperative discomfort, less postoperative need for medications, and vision returns more rapidly, often within a day or so. LASIK can also treat a higher range of vision errors. Although postoperative results vary, most patients are able to pass a driver's license test without their glasses or contact lenses.