Yep I'm basically blind without corrective lenses (something worse than 20/500). -7.00 in left and -7.50 in right eye
I can definitely see where loss of eyesight or eye problems as a younger person could cause severe depression leading to suicide. I don't think it is the Lasik making someone suicidal as much as the outcome of the procedure causing problems.
When I had a stroke a few years ago and this caused one of my eyes to not be in sync with the other (can't remember the technical name), causing double vision and other things. Dealing with the vision problems was harder than the physical and occupational therapy to learn to walk, write, type and the relearn fine motor skills with my hand.
Thankfully I was very determined (and younger) so my neurological pathways rewrote themselves and I am about 99% physically of where I was before bthe stroke.
After being sighted for so long and loosing the ability to see or one of your main senses is awful. I definitely think it would be easier to go blind at an early age than to go blind as an adult.
As far as Lasik, I don't think it is something for me, but knows what will happen in the future. If the crappy eyesight my family is cursed with holds steady my eyesight won't get much worse till I need reading glasses in about ten years.