"Lasix" is not one technology or surgery. If you meant the oldest variant of LASIK or LASEK, the complications are known, it is quite major eye surgery. Newer variants have lower rate of both short and long term complications. (femto-LASIK, the Epi-LASIK and more modern no-touch variants)

Also there are a few big studies comparing long term quality of life. Pretty favourable for surgery. This easily trumps "we found changes in cornea".