Corneal Thickness Measurements Using Time-domain Anterior Segment OCT, Ultrasound, and Scheimpflug Tomographer Pachymetry Before and After Corneal Cross-linking for Keratoconus

Abstract

Visante pachymetry shows better agreement with USP compared to Pentacam after CXL, which may be due to the inhomogeneous reflectivity of the postoperative cross-linked cornea and possibly altered refractive index and acoustic impedance that may influence the observed differences among techniques.