Five-Year Follow-up of the ELZA-sub400 Protocol: Individualized Corneal Cross-linking With Riboflavin and UV-A in Ultrathin Keratoconic Corneas.
PURPOSE To evaluate the 5-year safety and efficacy of the ELZA-sub400 protocol, an individualized stromal thickness-guided corneal cross-linking (CXL) technique, in eyes with progressive keratoconus and corneal stroma thickness of less than 400 µm. METHODS In this retrospective interventional case series, 39 eyes of...