Don't fear the Reaper, as the song goes. I've had both eyes done while I was in my forties. I was the youngest patient in the waiting room both times, which kinda freaked me out. Had the first done in '03 and the second two years later. It will NOT give you 20/20 vision, but it'll sure help you see a hell of a lot better, IMMEDIATELY.
It is absolutely painless. The procedure takes maybe three minutes, but the pre-op and the post-op times take about an hour each. You'll probably have to sleep with an eye patch for a few days, and make sure you use the drops or ointments they prescribe!!! You'll be amazed, literally the second they slip that lens in your eye, how clearly you'll be able to see.
Since I had mine done ten years ago or so, I do need reading glasses. I also have glasses to drive at night to reduce the glare. And the chances of having to have them replaced in my Seventies is pretty high, since these are designed to last only about thirty years. It's mostly seniors that have to have this done, right?