LASIK reoperation

Hello. It has been over four years since I had LASIK. My current vision is 1.2 in the right eye and 1.0 in the left eye. I am living happily and it truly feels like a new world. However, I am curious whether vision remains stable after LASIK or if it deteriorates with aging. If my vision does decline, is it possible to have a LASIK touch-up? I would appreciate your expert opinion.