Simulated Keratometry Versus Total Corneal Power by Ray Tracing: A Comparison in Prediction Accuracy of Intraocular Lens Power.

Purpose: To investigate the relationship between corneal powers measured by simulated keratometry (Sim-K) and ray tracing and understand whether their difference influences intraocular lens (IOL) power calculation.

Methods: In a first sample of healthy eyes, corneal curvature was measured using a rotating Scheimpflug camera (Sirius, CSO). Sim-K was obtained from anterior corneal curvature using the 1.