LASIK is a Laser Vision Correction procedure that treats refractive errors permanently. When the surgery is performed by an experienced surgeon using a careful screening process, the rate of success is very high.
In some cases, years after LASIK, your vision might not be as sharp as the first few years after the procedure. This is called regression and even though it can happen, it is unlikely. Each year after LASIK there is a slightly increased chance of needing a retreatment. It is common for refractive surgeons to offer an enhancement free of charge in the first year after LASIK if needed. Similar to wearing glasses, LASIK does not prevent your eyes from changing as a result of other diseases or aging. Around the age of 45 you will start wearing reading glasses. This can be corrected again with a laser procedure called PresbyLASIK. Later, old age is likely to give rise to cataracts or macular degeneration which would need a whole different treatment approach.