OCULUS Pentacam Interpretation Guide

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23 Case reports from daily practice
A slit lamp exam and a Pentacam® exam were performed, and the findings were correlated with each
other (Figure 201, Figure 202). The central cornea was clear with no edema. The peripheral cornea at
the incision location was edematous, with formation of small bullae on the surface. The pachymetric
map correlates with this finding. Interestingly the Scheimpflug image matches the “U shape” sign or
“camel sign” over the edematous area on the densitometry. This is caused by the high reflectivity of
the posterior layer of the cornea at the incision level.
23.6 Case 6: Corneal thinning after herpetic keratitis
by Prof. Renato Ambrósio Jr
A 68-year-old female patient entered the office with a long history of several episodes of herpes
simplex virus stromal keratitis. Careful slit lamp examination (Figure 203) revealed sub-epithelial
scarring of the central cornea consistent with the “ghost scarring” known of herpes simplex virus
infections.
Figure 203: Slit lamp photo revealed sub-epithelial scarring of the central cornea

OCULUS Pentacam Specifications

General

Measurement Time	Less than 2 seconds
Corneal Coverage	Up to 12 mm
Software	Pentacam Software
Data Transfer	USB
Corneal Topography	Yes
Display	External monitor required
Measurement Principle	Scheimpflug imaging
Camera	Rotating Scheimpflug camera
Light Source	Blue LED
Pachymetry	Yes
Anterior Chamber Analysis	Yes
Imaging Principle	Scheimpflug imaging
Fixation	Internal
Power Supply	100-240 V, 50/60 Hz
Resolution	High resolution
Lens Density Measurement	Yes
Dimensions	Varies depending on model and configuration
Weight	Varies by model, check manufacturer specifications
Number of Images	25 or 50