How permanent your LASIK results will be, depends on factors including your age, the stability of your prescription and your overall health. The eye continues to mature into our 20s, and so a LASIK procedure done at a very young age may be premature. Younger persons whose prescriptions need to be updated regularly should wait until their vision stabilizes, for the best results. Some patients who notice a slight regression at a later date choose a LASIK enhancement procedure, which involves a minor reshaping of the cornea to correct for any vision changes. A recent study published in the American Journal of Ophthalmology followed patients whose LASIK corrected for extreme myopia. Within 10 years of the initial procedure, just 6 percent chose a LASIK enhancement to fine-tune their vision. In the few cases in which nearsightedness, farsightedness or astigmatism eventually reappears after a LASIK procedure, it is unlikely you will ever return to your pre-surgical prescription. Research suggests that when regression occurs after LASIK, it is much more pronounced in those over 40, and more common among women than men.