OCULUS Pentacam Interpretation Guide

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22 Phakic IOL implantation
22.3 Patient selection criteria
by Prof. Burkhard Dick, Sabine Buchner, Optometrist
Careful pre-op evaluation and patient selection are essential prerequisites for a successful
implantation. There are several criteria that have to be considered. In our clinic, we look at the
following:
 The minimum clearance between pIOL and endothelium should be greater than 1 mm;
 Endothelial cell density should be at least 2000 per mm²;
 Dislocation of the pupil should be no greater than 1 mm. The Scheimpflug image in Figure 183
shows a dislocation by approx. 1070 μm;
 The cornea and crystalline lens should be clear;
 Iris convexity: If the iris is very irregular, it is better to refrain from pIOL surgery. The Pentacam®
pIOL simulation in Figure 184 shows an iris convexity of more than 15 degrees.
Figure 183: Scheimpflug image showing a both visible and measurable pupil dislocation

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