I had my done over 20 years ago, and only needed glasses again this year (and that is only for a very slight correction, I can see fine without them, while 20 years ago I was basically blind without my glasses). I can’t recommend lasik enough, especially for people with very bad eyesight.
Yeah, the vision during the procedure was not an issue at all. The smell of burnt eye as the laser works away was a bit off putting though. I can attest that burnt eye smells a lot similar to burnt hair.