Long-term study of topographic changes following pulsed accelerated corneal collagen cross-linking in progressive keratoconus

Purpose To evaluate long-term stability following pulsed accelerated cross-linking (CXL) in patients with progressive keratoconus by studying the changes in corneal topography.Patients and methods A retrospective study was conducted on patients with progressive grades 1–3 keratoconus who underwent epithelium-off pulsed-light accelerated corneal CXL (30 mW/cm2 for 8 min) using the KXL system (Avedro Inc.). Follow-up period was 12–36 months....