I had it done at least twenty years ago. I still have 20-10 and 20-20, but can't see crap up close without some dime store cheaters or a lot of light. They told me I could need bi focals by forty, but I made it to forty eight or so. It was probably the best money I ever spent. I had worn glasses since age six and was near sighted with astigmatism. ( guessed on that spelling ) I'm 58 now. Good luck.