Do a lot of research. There are always improvements being made. My daughter in law is thinking of getting it done, but says she's seen that there is some procedure now that has less downside risks associated with it. I don't know the specifics, and I don't try to steer her toward any particular approach. Ultimately, she's the one who would have to sign the statement before any procedure acknowledging that she is aware of the risks, including the risk of becoming blind as a result.
People that are satisfied with glasses or contacts (as my son is) should stick with what they're satisfied with. LASIK should only be done for people who hate the limitations placed on their life by glasses or contacts to the point that they're willing to take that risk of blindness. The risk is low, but it is there, and it's not something to be ignored.
In my case, while I was waiting for my ride to get there to pick me up to take me in for the procedure, I remember that I sat and watched the geese walking around in the field by my house and realized I may never see that (or anything else) again if things turned out bad. I hated wearing glasses, and not being able to see without them, enough that I was willing to accept that risk.
Well in that case I should not get it done. I can see well enough now.
What concerns me is the night vision. I am starting to have night vision issues when driving, which is a bad sign.