Does lasik vision correction really work permanently?

Mostly: Lasik reculpts the eyes inert middle corneal layers into a corrective lens, restoring vision. Most eyes do well but a few undergrow a reshaping over time that we entitle "regression", usually in the direction towards the origin power. Sometimes this is minimal, but can be significant. Check with your lasik surgeon if your vision is changing.

Yes: Yes. Lasik eliminates the distance prescription permanently.

LASIK: When performed by an experienced surgeon using modern equipment, lasik treatment will correct your distance prescription for as long as anatomy of your eye is stable. Typically, there is stability of the anatomy from your early 20s to your early 60s.