I have -3.5 in one eye and -3.75 in another eye. I'm fifteen. How much is lasic for my vision(i'm not gonna get it now, but when i'm older, say 21 or so)? Have you had this operation? Comments? P.S. What is my vision(a.k.a. 20/20 or 20/40) if my magnification is -3.75 and -3.5?