I think it can be possible even without eye surgery.

When I was poor I would only wear one contact at a time to make them last longer. I would alternative eyes, and would either take it out or switch to glasses when I was reading or looking at a screen for any extended amount of time. My eyesight improved after a few years, not to the point of being cured but my prescription got weaker. I don’t know if there’s actual causation, and the optometrist just said “hmm, interesting” when I brought it up, but it does seem like that is what improved my vision.

Also, I know someone with a rare vision issue who had to see a vision therapist to do eye exercises and whatever they did was helpful for them. That’s a more specific situation though than your typical eyesight problems where corrective lenses can be used because I think it involved how their brain processes visual input.