 The Galilei dual Scheimpflug analyzer is a non-invasive, diagnostic system that combines dual rotating Scheimpflug camera measurements and Placido optical system for corneal topography and 3D analysis of the anterior eye segment. It provides pachymetry as well as elevation and curvature mapping of the cornea. Additionally, the Ray tracing system delivers a more accurate total corneal power and anterior chamber depth. The total corneal power that the Galilei provides is an alternative that seems to be more accurate to calculate the IOL power in patients who have undergone keratorefractive surgery prior to cataract extraction and IOL implantation. 