Table of Contents
Advertisement
11 Corneal Thickness
Figure 76: Thickness profile in an ectatic and a normal eye
It is worth noting that Mandell and Polse pioneered this field in a study using a modified Haag-
Streit optical pachymeter with an electronic recording system to document the variation in
thickness over the horizontal meridian measured at different angles [6]. However, this interesting
approach to evaluating the cornea was not used clinically for decades.
In developing the Pentacam® software the results of our studies served as a basis for engineering
new summaries and graphs that would help clinicians explore CTSP and PIT so as to be able to
objectively evaluate thickness profiles and detect ectasia. The software displays the CTSP and PIT
curves of the examined eye together with the CI95 limits of a normal population. Initially, these
graphs were included in a "keratoconus page" along with other topographic indices derived from
the 8 mm anterior corneal curvature which were similar to those used in Placido topography.
66
Hide quick links:
Advertisement
Table of Contents
