Several factors may affect long-term vision stability in LASIK. If your glasses or contact lens prescription have remained the same for at least two years prior to LASIK, then you are more likely to have stable vision after the procedure. Those patients who have very high prescriptions for near sightedness, far sightedness, or astigmatism may have a higher rate of regression (that is the initial effect of LASIK may wear off over time). Regression usually takes place within the first 6 months of a LASIK procedure. After an enhancement procedure, long-term stability of vision will likely ensue. Some patients may have "soft corneas" or even require treatment for undiagnosed keratoconus during their screening exam. In the past, these cases would ...