Two strategies are currently used for corneal refractive surgery: Laser-assisted in situ keratomileusis (LASIK), and Small incision lenticule extraction (SmILE). For the first, the surgeon makes an incision parallel to the corneal surface, creating a thin flap, and then undertakes ablation by excimer laser of the stromal material to correct the refractive error. With SmILE, two intrastromal incisions produce a corneal lenticule that the surgeon removes using forceps through small side cuts.