Speed and Accuracy of the Galilei’s Dual Scheimpflug Cameras on the Galilei Topographer
Professor of Ophthalmology
The Ohio State University
The fundamental advantages are that it has an integrated Placido along with the dual Scheimpflug cross-sectional image. And there are scads of literature from 30 years ago that actually show there’s nothing better for measuring curvature than a Placido. It takes much higher resolution to try and estimate curvature from an elevation measurement.
So, what the Galilei does is take an excellent measurement of curvature along with dual Scheimpflug. So, they actually look at the thickness of the cornea from two different angles and can tell if there’s any misalignment in that because as it moves side-to-side,
One Scheimpflug will get thicker while the other gets thinner. And then as it goes the other way, the opposite happens.
Dual Scheimpflug images for superior thickness profile
So, the thickness profile that’s actually generated by the Galilei is superior to the devices that use a single Scheimpflug image. So that’s what actually attracted me to implementing the CLMI.X on this device because it has two Scheimpflug images plus an integrated Placido to really — it gives you the best of two different, actually three different technologies. And then with the CLMI.X, we use a consistent analysis on all of the surfaces as well as the thickness profile.