There is sadly no guarantee that they help, and they can damage your eyes in the worst case.
It is one of the best things I did.
I read up on it before and didn't read something totally crazy but as with everything there is always risk to it.
That's one reason why I have problems to just suggesting it to everyone/anyone while my results are great.
But I also had 5 Dioptrien.
However, I did Lasik, maybe 10-15 years ago, no problems now and never had a problem.
The industry did feel a bit sketchy though. Not sure if it's improved. I'm sure most of the professionals involved are excellent - but at the time, it felt very private, and not in a good way.
/anecdote
A friend of mine did a Lasik surgery, but lost his sight after a week (1/10 on one eye). AFAIK, there was no wrongdoing from the doctor side, so no financial compensation.
I think it was a good decision in my case, mainly because in my 20's I used to be into decently active activities (5ks runs, long distance biking, etc), so I didn't have to choose between seeing correctly or enjoying what I was doing to the fullest.
I know that outcomes vary but for me by now I don't actually remember what it was to be shortsighted and all outdoor activities are soo much nicer without contacts or glasses. I'd definitely do it again in a heartbeat.
I had dry eyes post surgery. First 6 months I was miserable. Had to put goop on my eyes at night the viscosity of Vaseline. Felt like years before I got to a normal state.
It’s been about 16 years. I wear glasses again, but I can get by without. Still occasionally have dry eyes.
The entire business model exists only by not informing you of everything that can go wrong.
Ironically I now know more about these procedures than I ever did before, and all I've learned is how the entire industry is aligned to not tell patients about what things effects the outcome and how little they actually can do if the results are not good.
Edit : If you google lasik/Smile complications and so on you'll just find a rabbit hole of despair from people who had their eyes ruined. I'm kinda amazed that medical professionals actually has the conscience to perform these procedures. Theres also this tendency to blame dry eyes - which is just the industry's way of camouflaging the real issues.