I was evaluated for wavefront LASIK at the Stanford Eye Laser Center and I asked the doctor there specifically about this, because like you I wondered whether LASIK would be lower-risk than wearing contacts for the rest of my life. He said that conditioned on the fact that I had already worn contacts continually for several years without any problems, it probably wasn't true that continuing to wear contacts was a higher risk than LASIK. (I might have gotten LASIK anyway, but it turned out that I have unusually large pupils, which ups the likelihood of bad side effects.)