Just read the wiki article on LASIK, and I quote,
The most common complication from refractive surgery is the incidence of "dry eyes." According to an American Journal of Ophthalmology study of March 2006,
the incidence rate of dry eyes from LASIK after the six month post operative healing period was 36.36%.[37]. The FDA (Food and Drugs Administration) website states that "dry eyes" may be permanent.[38]
The risk for a patient of suffering from disturbing visual side effects such as
halos,
double vision (ghosting), loss of
contrast sensitivity (foggy vision) and
glare after LASIK depends on the degree of
ametropia before the laser eye surgery and other risk factors.
[39] For this reason, it is important to take into account the individual risk potential of a patient and not just the average probability for all patients.
[40] The following are some of the more frequently reported complications of LASIK
[41][42]: