Long-Term Clinical Outcomes of Small-Incision Femtosecond Laser-Assisted Intracorneal Concave Lenticule Implantation in Patients with Keratoconus

Figure 3

Means of posterior surface curvatures K1 and K2 before the operation were −7.74 ± 0.43 and −8.96 ± 0.48, respectively, and remained stable after surgery. At 60 months postsurgically, the posterior surface curvature K1 and K2 were −7.98 ±k 0.50 and −9.11 ± 0.55, respectively, with no significant change as compared to the preoperative values. The mean of corneal posterior surface height, which is an indicator of surgical stability, was 94.14 ± 13.67 μm preoperatively and 96.01 ± 12.96 μm at 60 months postsurgically, without significant change relative to the preoperative levels.