Had Lasik twice (90s) ... once in Windsor Canada a few years before it was legal in US, and then a 2nd one in US after a couple of years later because I had ended up around 20/40 after first one. 2nd Lasik got me to 20/20 and corrected astigmatism. I was 10.5 diopters in both eyes (20/1000+) before the first one ... and some astigmatism. I was told a couple of years ago by one Lasik surgery office that they no longer do Lasik for that much myopia ... instead opt for lens insert. My cornea thickness checked out fine at the time ... cornea has to be thick enough to accomodate the amount of layer they need to remove with laser. Both surgeries done with Microkeratome blade to cut flap. Found out many years later they quit cutting new flap on 2nd Lasiks ... and pried up the flap instead.
I had zero pain or issues (dry eyes, halos, etc) with either procedure. I had worn hard contacts (pre-gas permeable) for 20ish years starting at age 15 ... first Lasik mid 30s. I have used Systane Ultra twice a day for decades because eye doc says I have minor dry eye ... but I would not have known without them checking.
I had 20/20 vision for around 25 years ... pretty amazing considering how nearsighted I was. Yes ... way cool waking up and reading clock on other side of room. Actually ... when the surgeon placed the flap back down on first eye I immediately saw the ceiling pretty clearly ... never forget that moment.
20/20 faded a couple of years ago ... just got a new prescription (-1.50ish myopia and astigmatism in both eyes). The bigger issue is some moderate irregular astigmatism caused by Lasik that can't be corrected with soft contacts, or even standard hard contacts. Glasses until new prescription corrected both eyes to 20/20 ... but now left just corrects to 20/30. I can get best correction now with a $1500 scleral lense (larger hard contact that sits on white part of eye) ... and would have for tennis if I was still playing a lot (particularly if I was playing indoor tennis).
Yeah ... wish the 20/20 lasted forever ... but 25 years of 20/20 without contacts or glasses was one of the best gifts I ever gave myself. No regrets. Also ... my hand was forced ... had developed scarring/callous on white part of eye from all those years wearing hard contacts (particularly outdoor windy tennis), so my contact wearing days were about to end.
Regarding reading glasses ... I was still seeing 20/20 and no need for reading glasses until 57-58ish. I now just order progressive lenses ... but I can still read pretty good without any glasses at 63.
btw ... do have some floaters, showed up 3-4 years ago and have not gone away. They do move around faster now
... the gel in our eyes becomes more liquid when we age.