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《临床实践中的角膜断层扫描（Pentacam系统）：基础知识和临床解释，第4版》
Corneal Tomography in Clinical Practice （Pentacam System）: Basics and Clinical Interpretation
著作简介
Price : $100.71
Pages : 260 pages
Publisher : Jaypee UK, Edition 4 （May 31, 2021）
SBN-10 : 1787791610
ISBN-13 : 978-1787791619
Language : English
著者简介
Mazen M. Sinjab 教授
Mazen Sinjab教授拥有眼科硕士学位、阿拉伯委员会证书、博士学位以及伦敦皇家眼科学院激光和屈光手术证书。Mazen Sinjab教授是爱丁堡皇家外科医学院的一名审查员，是摩洛哥卡萨布兰卡Hassan II大学的眼科客座教授，是在阿联酋迪拜和叙利亚大马士革的诊所的资深顾问眼科医生。同时他也是医学研究员和课程讲师，通过演讲和教育课程为区域和国际会议做出贡献。2015年Mazen Sinjab教授荣获伦敦皇家眼科学院的荣誉研究金。
著作说明
角膜断层扫描是一种无创医学成像技术，用于绘制角膜（眼睛的外部结构）的表面曲率。《临床实践中的角膜断层扫描（Pentacam系统）：基础知识和临床解释，第4版》全面更新，提供了使用Pentacam 系统进行角膜断层扫描的最新进展。涵盖了角膜地形图和概况、角膜屈光、波前分析、角膜断层扫描的系统解释以及角膜层析成像术在扩张性角膜疾病中的应用。这个版本包括7个部分，包括26章，有丰富的信息、数字、插图和临床实例。内容亮点包括：
角膜光学和几何的临床基础。
角膜地形图和断层扫描的临床基础知识。
Pentacam HR 的所有配置文件、地图和显示，包括 Belin Ambrosio 增强型扩张显示、Holladay 报告和角膜地形图。
波前分析和测量的临床基础，包括 Zernike 分析和傅立叶分析。
扩张性角膜疾病的新断层扫描定义和特征。
扩张性角膜疾病分级系统，包括Belin ABCD圆锥角膜分级。
如何将角膜断层扫描应用于激光和晶状体的屈光矫正手术？
如何应用角膜断层扫描进行现代白内障手术？
目录
Contents
SECTION 1: Introduction
1. Corneal Optics and Geometry............................................................................................... 3
The Optical System of the Human Eye 3
Corneal Geometry 5
2. Measuring Corneal Geometry............................................................................................... 8
Curvature-based Devices （Topographers） 8
Elevation-based Tomographers 10
OCT-based Tomographers 11
Topography versus Tomography 11
Systems Available in the Market 13
3. Screening Guidelines........................................................................................................... 14
The Four-Composite Map 14
General Settings 14
Main Color Bar Settings 16
Maps Overlay 17
Specific Settings for Holladay Report 20
Image Quality Control 20
SECTION 2: Tomographic Maps and Profiles
4.Overview............................................................................................................................... 29
Corneal Parameters 29
5. Corneal Power Maps ............................................................................................................ 32
Factors Affecting Corneal Power Measurement 32
Maps Measuring Corneal Power 32
Patterns of Corneal Curvature 37
Clinical Differences between the Sagittal and Tangential Curvature Maps 42
6. Elevation Maps..................................................................................................................... 45
Principle of the Elevation Maps 45
The Reference Surface 45
Patterns of Elevation Maps 49
7. Belin/Ambrósio Enhanced Ectasia...................................................................................... 54
The Belin/Ambrósio Ectasia Display 54
Pachymetric Data 55
Numeric Values 60
Clinical Applications of Belin/Ambrósio Enhanced Ectasia 60
xvi Corneal Tomography in Clinical Practice （Pentacam System）: Basics and Clinical Interpretation
8. Corneal Thickness Maps and Profiles ................................................................................. 64
Corneal Thickness Map （Pachymetry Map） 64
Corneal Thickness Spatial Profile and Percentage Thickness Increase 66
Pachymetric Progression Index 67
The Relative Pachymetry 70
9. Geometric Tomography and Corneal Topometry.............................................................. 75
Corneal Toricity 75
Corneal Asphericity 75
Corneal Asymmetry 76
SECTION 3: Understanding Corneal Refraction
10. Astigmatism ......................................................................................................................... 83
Definitions and Classifications of Astigmatism 83
Types of Astigmatism 83
Etiology of Irregular Astigmatism 86
Evaluation of Irregular Astigmatism 90
11. Objective Corneal Dioptric Power ...................................................................................... 95
Calculating Objective Corneal Dioptric Power 95
Clinical Examples 96
12. Astigmatic Disparity ............................................................................................................ 99
Etiology 99
Types of Astigmatic Disparity 100
Management of Astigmatic Disparity 100
SECTION 4: Wavefront Science
13. Basics of Wavefront Analysis and Measurements ........................................................... 105
Principles of Wavefront and Wavefront Analysis 105
Classification of Aberrations 105
Measurement of Aberrations 105
Analytic Systems 108
Changes of Aberrations with Age 109
Clinical Application of Wavefront Technology 109
14. Zernike Analysis ................................................................................................................. 111
Understanding Zernike Polynomials 112
Correlation between Zernike Polynomials and Irregular Astigmatism Types 112
Description of Zernike Polynomials 115
15. Fourier Analysis.................................................................................................................. 123
Fourier Analysis of Corneal Wavefront 124
xvii Contents
16. Corneal Asphericity and Related Functions..................................................................... 127
Corneal Shapes related to Asphericity 127
Q-Value and Corneal Asphericity 128
Corneal and Ocular Spherical Aberration 128
Visual Function and Spherical Aberration 132
Depth of Focus 132
Ocular Spherical Aberration and Neural Adaptation 135
The Effect of Corneal Asphericity on Measuring Refraction 137
The Effect of Corneal Asphericity on Vision 139
SECTION 5: The Systematic Interpretation of Corneal Tomography
17. Factors of False Findings ................................................................................................... 143
Contact Lenses 143
Misalignment 143
Large Angle Kappa or Lambda 146
Tear Film Disturbance 146
Corneal Opacities and Pathologies 148
Previous Corneal Surgeries 148
Inadequate Exposure to the Camera 149
Pregnancy 149
18. Enantiomorphism .............................................................................................................. 152
19. The Practical Subjective Scoring System ......................................................................... 157
The Practical Subjective Scoring System （PS3） 157
Application of the PS3 in Laser-based Refractive Surgery 162
Regularity versus Risk Scoring 163
20. The Practical Subjective IOL Selection Algorithm........................................................... 169
SECTION 6: Corneal Tomography in Ectatic Corneal Diseases
21. Tomographic Characteristics of Ectatic Corneal Diseases .............................................. 173
Tomographic Definition of ECDs 173
22. Grading Systems of Ectatic Corneal Diseases .................................................................. 180
Amsler–Krumeich Classification 180
Alio–Shabayek Modification 180
Modification of Ishii and Associates 180
Belin “ABCD” Grading System 180
23. Progression Criteria ........................................................................................................... 184
Parameters of Progression 184
Observing Progression 187
To Crosslink or not to Crosslink 188
Observation after Corneal Crosslinking 188
xviii Corneal Tomography in Clinical Practice （Pentacam System）: Basics and Clinical Interpretation
24. Entities Misdiagnosed as Ectasia...................................................................................... 189
Source 189
Patterns 189
SECTION 7: Miscellaneous
25. The Holladay Report.......................................................................................................... 205
Holladay Report 205
Holladay Detailed EKR Report 207
Clinical Examples 209
26. Corneal Tomography in Cataract Surgery........................................................................ 218
Preoperative Screening Process 218
Preoperative Planning Process 219
Postoperative Planning Process 222
Bibliography ...............................................................................................................................225
Index ............................................................................................................................................235
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