The procedure is very safe, and that is why it has been so readily accepted. With any surgical procedures, however, there may be complications. Vision-threatening complications do exist, but they are extremely rare. These include infections (an incidence of 1 in 5,000) and irregular healing processes that can lead to something called "irregular astigmatism" that glasses cannot correct and contact lenses or further surgery may be required to improve. There are also complications which may lead to temporary blurriness, temporary dependence on glasses or contact lenses, or a need for additional surgery. In most cases, the patient can still do well and recover with good vision. It is for this reason that LASIK patients should confirm the experience of their surgeon to determine if he or she has specialized training in cornea surgery. Because LASIK is performed on the cornea, knowledge of the healing properties of the cornea and management of any complications are critical to the patient's well being. Knowing how to handle a complication, should one occur, can make a significant difference in the patient's outcome.