Zhou X, et al. - In this investigation, researchers studied the change in posterior corneal elevations (PCEs) of eyes with extremely high myopia two years after small incision lenticule extraction (SMILE). Thirty-nine eyes of 39 patients with spherical equivalent higher than −10.00 dioptres (D) were evaluated. Another 34 eyes of 34 patients who were subjected to femtosecond laser-assisted in situ keratomileusis (FS-LASIK) were examined as the control group before, at 1 day and long after surgery. In both surgeries, no significant forward displacements of PCEs were noted. The maximal but not significant forward displacement occurred about 3-6 months after SMILE, and all returned postoperatively to the original levels for 6 months except for the superior area. Overall, the investigators concluded that SMILE is a safe way to correct myopia higher than −10 D, with PCEs 2 years after surgery remaining stable.