The new FEMTO LDV Z Models at the ASCRS in Chicago 2012

May 03, 2012

Ziemer Ophthalmic Systems is pleased to announce that the Femto LDV Z2, Z4 and Z6 (PowerPlus) have...

March 21, 2012

The NEW Ziemer Femto platform for cornea and presbyopia and cataract. A technical revolution in...

March 07, 2012

DOC Nürnberg, 2012, June 14 to 16


SOG Fribourg, 2012, August 29 to September 1


ESCRS Milan, September 8 to 12


Last Update: 16.05.2012

Merging Scheimpflug and Placido Data

Merging Scheimpflug and Placido Images

Scheimpflug images furnish precise elevation data of the cornea. Placido images are superior for obtaining accurate curvature data. GALILEI™ combines both.

Although the resolution of Scheimpflug images is high enough to deliver accurate profile data, it is insufficient to calculate central corneal power (curvature data) with acceptable accuracy.

Placido images provide very precise curvature data, even from the central part of the cornea, but they fail to accurately represent small differences in elevation.

GALILEI™ overcomes this limitation by merging Placido and Scheimpflug data, acquired simultaneously by the two techniques, into a comprehensive single data set. This is essential for obtaining highest accuracy for both elevation and curvature data across the entire cornea.

GALILEI automatically acquires sets of dual Scheimpflug images and Placido images. Shown in this figure is the setup view seen by the operator while adjusting the cameras for focus and centration on the subnject's eye.