I got Lasik at 22. First doctor at the place said I was too young and my eyes were still adjusting to where they would naturally sit. Then doctor number two called and was like "Nah man, you are good (also I want your money)." Shit really is life changing, the day afterward sucked cause my eyes were itchy and you aren't allowed to touch them (have to wear plastic things on your eyes to sleep), but after that it was like a miracle. I had been wearing glasses since I was 9. That said, Doctor #1 was correct, as my sight has deteriorated in the 9 years since. No where near as bad as it originally was, its just that I am no longer 20/20. I will probably have it redone again some day when I have the money (first time was a gift).
I am unsure if it is worth it just for reading up close, but overall the effects of the procedure are amazing.