The success of keratoplasty does not only depend on the success of the surgery, the clarity and the position of the graft, the location, direction and tightness of the sutures, but it also depends on the functional status of the graft and the amount of residual refractive error found after keratoplasty. The excessive residual sphero-cylindrical error has become the most challenging and common complication after keratoplasty.
Refractive surgeries originally used to treat naturally occurring sphero-cylindrical errors have shown great success and reliability in the recent era, to treat post-keratoplasty refractive errors.
LASIK is one of the refractive surgeries which showed great safety, predictability, and efficacy to manage post-keratoplasty refractive errors with the least complications. It replaces glasses for patients who cannot tolerate them because of the great difference in refractive errors between both eyes and anisometropia. It also replaces contact lenses which are not tolerable by the patients because of dry eye, corneal irregularity, or difficulty to apply them.