OCULUS Pentacam Interpretation Guide

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10 Screening for refractive surgery by Prof. Michael W. Belin................................................47-63
10.1 Screening parameters, 4 Maps Refractive display......................................................................47
10.1.1 Suggested installation settings ...........................................................................................47
10.1.2 Proposed screening parameters ...........................................................................................48
10.1.3 Strategy on how to go through the exams ......................................................................49
10.2 Normal, astigmatic cornea ................................................................................................................49
10.3 Astigmatism on the posterior cornea .............................................................................................52
10.4 Spherical cornea...................................................................................................................................53
10.5 Thin spherical cornea ..........................................................................................................................54
10.6 Thin cornea ............................................................................................................................................55
10.7 Borderline case of keratoconus ........................................................................................................56
10.8 Displaced apex...................................................................................................................................... 57
10.9 Pellucid marginal degeneration .......................................................................................................58
10.10 Asymmetric keratoconus ....................................................................................................................59
10.11 Keratoconus with false negative findings on curvature map ..................................................61
10.12 Keratoconus greater in OD than OS ................................................................................................62
10.13 Classic keratoconus .............................................................................................................................63
11 Corneal Thickness Spatial Profile by Prof. Renato Ambrósio Jr .......................................64-79
11.1 Screening for ectasia by Prof. Renato Ambrósio Jr, Marcela Q. Salomão, MD...................67
11.2 Case 1: Fuchs’ dystrophy by Prof. Renato Ambrósio Jr, Marcela Q. Salomão, MD............72
11.3 Case 2: Ocular hypertension by Prof. Renato Ambrósio Jr,
Marcela Q. Salomão, MD................................................................................................................... 74
11.4 Case 3: Early Fuchs’ dystrophy with glaucoma by Prof. Renato Ambrósio Jr,
Marcela Q. Salomão, MD................................................................................................................... 76
11.5 Screening parameters by Prof. Renato Ambrósio Jr ..................................................................79
12 Belin/Ambrósio Enhanced Ectasia Display.............................................................................80-102
12.1 Why elevation is displayed by Prof. Michael W. Belin ...............................................................80
12.2 Simplifying preoperative keratoconus screening by Prof. Michael W. Belin,
Prof. Renato Ambrósio Jr, Andreas Steinmüller, MSc................................................................88
12.3 Interpretation of the Belin/Ambrósio Enhanced Ectasia Display............................................94
12.4 Pachymetry evaluation........................................................................................................................96
12.5 Ectasia susceptibility revealed by the Belin/Ambrósio Enhanced Ectasia Display.............96
12.6 Early ectasia with asymmetric keratoconus by Prof. Renato Ambrósio Jr,
Fernando Faria- Correia, MD, Allan Luz, MD...............................................................................100
13 Locating the cone by Prof. Michael W. Belin..............................................................................102
14 The corneal densitometry screen, Sorcha S. Ní Dhubhghaill, MB, PhD,
Jos J. Rozema, MSc, PhD......................................................................................................... 103-107
14.1 Keratic precipitates............................................................................................................................104
14.2 Position and depth of INTACS® rings............................................................................................106
14.3 DSAEK with specks at the interface..............................................................................................107
15 Using Pentacam® technology to evaluate corneal scars, planning and documenting
surgery outcomes by Arun C. Gulani, MD, MS.................................................................. 108-116
15.1 Case 1: Corneal scar with RK incisions and cataract...............................................................112
15.2 Case 2: Keratoconus with congenital cataract, high myopia and high astigmatism.....115
Table of contents

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