- Pentacam (Oculus, Wetzlar, Germany) for the OKL group at BL, T0, day 3, 7 as well as month 1, 3, 6, 12 and 18 after T0 (measurements obtained 2-4 hours after lens removal). For the group wearing SVS at BL, and month 6, 12 and 18 after T0.