Yes, laser surgery permanently alters the shape and focus of your cornea.
The effect of laser surgery does not wear off but your eyes can continue to change with age. This is more likely for those who have a high refractive error to begin with. If your eyes do change, it may mean that glasses, or laser enhancement may be necessary. It takes 3 months or more for your vision to completely stabilise after the procedure but most of the change happens in the first month. After this you should not be aware of any change in distance vision. In the very long run there will be changes in the lens inside your eye that may alter the focus when cataracts start to develop. That may then require cataract surgery.