Got LASIK done 15+ years ago, in and out in under an hour and still have 20/20 to this day. It made a HUGE difference for me, a lot more than I expected.
It all depends on what's wrong with your eyes. Different issues will need different procedures, and some are more effective with less side effects than others.
But my wife used to work at an eye doctor and she said they'd have a lot of older people come in with cataracts, scar tissue, or other issues they believe were from the laser surgery, but I think that was from the really early stuff. I think the science is far enough along now and the studies have had enough time to gather long-term results that you should be ok (assuming no weird shit goes down).