Does Lasik weaken the cornea?
All laser vision correction procedures that work on the cornea will "weaken" it to at least some degree. The "trick" is to minimize any structural weakening of the cornea to an acceptable range while still achieving full correction of the myopia ( nearsightedness). There is a proportional relationship between how much myopia you have and how much corneal thinning will occur in LASIK. So in general, significant weakening of the cornea in LASIK is mostly a problem in treating very high prescriptions, and not so much at all in cases of a lower Rx.
_Written by J. Trevor Woodhams, M.D. - Chief of Surgery, Woodhams Eye Clinic