This method differs from LASIK in that no prior corneal flap is created in the procedure. After simple removal of the corneal epithelium, the excimer laser is applied onto the cornea to correct the refractive error.
Advanced surface ablation is mainly used in patients who have significantly high refractive errors in whom there may not be adequate corneal tissue to create a flap. The end results of this method are just as satisfactory compared to LASIK.
However, the time required for optimal visual clarity may be longer as time is required for the surface of the cornea to recover.