OCULUS Pentacam Interpretation Guide

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22 Phakic IOL implantation
22 Phakic IOL implantation
22.1 Manual pre-op simulation and post-op control
by Eduardo Viteri, MD
22.1.1 Preoperative evaluation
A high myopic, 20-year-old patient entered the office; refraction data:
 OD: sph -12.00 (cyl -1.50 A 180°)
 OS: sph -12.50 (cyl -1.50 A 10°)
She complained of poor contact lens tolerance with less than 4 hours of daily wearing time. We
discussed several treatments and the possibility of implanting a pIOL. The Pentacam® allows us to
measure very easily and accurately the anterior chamber and so determine if there is enough space
to implant an iris-fixated Artisan phakic IOL.
One can measure not only the distance from the endothelium to the anterior surface of the
crystalline lens but also the available space at the point where the claws will grasp the iris
(Figure 176). Most important are minimum distances, which are in most cases not perpendicular to
the iris, but diagonal.
A Pentacam® examination for the pre-op planning of the surgery showed there was enough space
for the Artisan pIOL implant.
Figure 176: Scheimpflug Image with pre-op measurements

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