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Essentials in Ophthalmology

Medical Retina

 

F. G. Holz R. F. Spaide

 

Editors

 

 

Essentials in Ophthalmology

Glaucoma

G. K. Krieglstein R. N. Weinreb

Cataract and Refractive Surgery

Series Editors

Uveitis and Immunological Disorders

 

 

Vitreo-retinal Surgery

 

Medical Retina

 

Oculoplastics and Orbit

 

Pediatric Ophthalmology,

 

Neuro-Ophthalmology, Genetics

 

Cornea and External Eye Disease

Editors Frank G. Holz

Richard F. Spaide

Medical Retina

With 91 Figures, Mostly in Colour

and 13 Tables

123

 

 

Series Editors

Volume Editors

Günter K. Krieglstein, MD

Frank G. Holz, MD

Professor and Chairman

Professor and Chairman

Department of Ophthalmology

Department of Ophthalmology

University of Cologne

University of Bonn

Kerpener Straße 62

Ernst-Abbe-Straße 2

50924 Cologne

53127 Bonn

Germany

Germany

Robert N. Weinreb, MD

Richard F. Spaide, MD

Professor and Director

Assistant Clinical Professor

Hamilton Glaucoma Center

Vitreous, Retina, and Macula Consultants

Department of Ophthalmology

of New York, and

University of California at San Diego

LuEsther T. Mertz Retinal Research Center

9500 Gilman Drive

Manhattan Eye, Ear, and Throat Hospital

La Jolla, CA 92093-0946

460 Park Avenue

USA

New York, NY 10022

 

USA

ISBN 978-3-540-33671-6

ISSN 1612-3212

Springer Berlin Heidelberg NewYork

 

Library of Congress Control Number: 2007927503

This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from SpringerVerlag. Violations are liable for prosecution under the German Copyright Law.

Springer is a part of Springer Science + Business Media springer.com

© Springer-Verlag Berlin Heidelberg 2007

The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use.

Product liability: The publishers cannot guarantee the accuracy of any information about dosage and application contained in this book. In every individual case the user must check such information by consulting the relevant literature.

Editor: Marion Philipp, Heidelberg, Germany

Desk Editor: Martina Himberger, Heidelberg, Germany Production: LE-TeX Jelonek, Schmidt & Vöckler GbR, Leipzig, Germany

Cover Design: WMXDesign GmbH, Heidelberg, Germany

Printed on acid-free paper 24/3180Wa 5 4 3 2 1 0

Foreword

The series Essentials in Ophthalmology was initiated two years ago to expedite the timely transfer of new information in vision science and evidence-based medicine into clinical practice. We thought that this prospicient idea would be moved and guided by a resolute commitment to excellence. It is reasonable to now update our readers with what has been achieved.

The immediate goal was to transfer information through a high quality quarterly publication in which ophthalmology would be represented by eight subspecialties. In this regard, each issue has had a subspecialty theme and has been overseen by two internationally recognized volume editors, who in turn have invited a bevy of experts

to discuss clinically relevant and appropriate topics. Summaries of clinically relevant information have been provided throughout each chapter.

Each subspecialty area now has been covered once, and the response to the first eight volumes in the series has been enthusiastically positive. With the start of the second cycle of subspecialty coverage, the dissemination of practical information will be continued as we learn more about the emerging advances in various ophthalmic subspecialties that can be applied to obtain the best possible care of our patients. Moreover, we will continue to highlight clinically relevant information and maintain our commitment to excellence.

G. K. Krieglstein

R. N.Weinreb

Series Editors

Preface

Clinicians and basic scientists from the fields of ophthalmology and vision research have made tremendous progress in understanding the pathogenesis of retinal diseases, developing novel diagnostic techniques, and instituting new treatments for retinal conditions.

This multi-authored volume provides concise updates on the relevant and most challenging topics in medical retina. It is a practical and useful publication that will help all ophthalmologists, whether in training or in practice, to manage patients with retinal diseases.

The first two chapters on microperimetry and scanning laser fundus imaging highlight the advances in diagnostic technology that have contributed significantly to our understanding of the pathophysiology and treatment of various diseases. The following chapters address the latest developments in the area of age-related

macular degeneration including an update on genetic factors, current management strategies using anti-VEGF therapy, the role of combination treatments, and nutritional supplementation. The atrophic form of late AMD, i.e., geographic atrophy, is also addressed. Furthermore, current treatment approaches to diabetic macular edema and retinal vein occlusions are described. Finally, there is a discussion of the novel insights into Stargardt’s disease and idiopathic macular teleangiectasia, as well as perspectives on the expanding field of artificial vision.

Time and effort have been generously given by the contributing authors, to whom we, as editors, are extremely grateful. We are indebted to the editorial and production staff at Springer for their commitment to a timely publication in this rapidly moving field.

Frank G. Holz

Richard F. Spaide

Contents

Chapter 1

Microperimetry in Macular Disease

Klaus Rohrschneider

1.1

Introduction . . . . . . . . . . . . . . . .

1

1.2

Instruments . . . . . . . . . . . . . . . . .

2

1.2.1

Scanning Laser

 

 

Ophthalmoscope . . . . . . . . . . . .

2

1.2.1.1Fundus Perimetry

 

(Microperimetry) . . . . . . . . . . . .

3

1.2.2

Micro Perimeter 1 . . . . . . . . . . .

4

1.2.2.1Static Threshold Fundus

Perimetry . . . . . . . . . . . . . . .

. . . . 4

1.2.2.2 Kinetic Fundus Perimetry

. . . . 6

1.2.3Comparison Between SLO

Perimetry and MP 1 . . . . . . . . .

6

1.2.4Accuracy of Fundus

 

Perimetry . . . . . . . . . . . . . . .

. . . 6

1.2.4.1

Static Threshold Perimetry

. . . 6

1.2.4.2

Kinetic Perimetry . . . . . . . .

. . . 7

1.2.5Fundus-related Perimetry

 

Versus Cupola Perimetry

. . . . .

7

1.3

Clinical Implementation

. . . . .

8

1.3.1

Macular Holes . . . . . . . . . .

. . . . .

8

1.3.2Age-related Macular

Degeneration . . . . . . . . . . . . . . 10

1.3.2.1Geographic Atrophy of the

RPE . . . . . . . . . . . . . . . . . . . . . . . 10

1.3.2.2Choroidal

 

Neovascularization in AMD . .

10

1.3.3

Diabetic Retinopathy . . . . . . .

10

1.3.4Central Serous

 

Chorioretinopathy . . . . . . . . . .

14

1.3.5

Stargardt’s Disease . . . . . . . . .

15

1.3.6

Vitelliform Macular

 

 

Dystrophy (Best’s Disease) . . .

16

1.4

Conclusion . . . . . . . . . . . . . . . . .

16

Chapter 2

New Developments

in cSLO Fundus Imaging

Giovanni Staurenghi, Grazia Levi,

Silvia Pedenovi, Chiara Veronese

2.1

Introduction . . . . . . . . . . . . . . .

21

2.2

Near Infrared Imaging . . . . . .

22

2.2.1

Introduction . . . . . . . . . . . . . . .

22

2.2.2The Effect of Wavelength

on Imaging in the Human Fundus . . . . . . . . . . . . . . . . . . . . 22

2.2.3Comparison of Light Tissue Interactions for Visible and Near Infrared Wavelengths

 

Using SLO . . . . . . . . . . . . . . . . .

22

2.2.4

Mode of Imaging . . . . . . . . . . .

22

2.2.5

Contrast of the Fundus . . . . . .

23

2.2.6

Fundus Features . . . . . . . . . . . .

23

2.2.7Imaging of Pathological

Features in Direct

and Indirect Mode . . . . . . . . . . 23

2.3Blue Autofluorescence

Imaging . . . . . . . . . . . . . . . . . . . 23

2.3.1Autofluorescence and the

Eye . . . . . . . . . . . . . . . . . . . . . . . . 24

2.3.1.1Fluorescence of the Retinal

Pigment Epithelium . . . . . . . .

24

2.3.1.2How to Evaluate RPE

Autofluorescence . . . . . . . . . . 24

2.3.2Fundus Autofluorescence

Changes in Early AMD . . . . . .

25

2.3.3Fundus Autofluorescence

Changes in Choroidal Neovascularization in AMD . . 26

2.3.4Fundus Autofluorescence Changes in Geographic

Atrophy in AMD . . . . . . . . . . . .

26

2.3.5Fundus Autofluorescence in Acute and Chronic

Recurrent Central Serous

Chorioretinopathy . . . . . . . . . . 27

XContents

2.3.6

Fundus Autofluorescence

 

4.1.1

Historical Perspective . . . . . .

53

 

in Stargardt’s Macular

 

4.1.2

VEGF Isoforms . . . . . . . . . . . . .

54

 

Dystrophy-Fundus

 

4.1.3

VEGF Expression . . . . . . . . . . .

54

 

Flavimaculatus . . . . . . . . . . . . .

27

4.1.4

VEGF Receptors . . . . . . . . . . . .

54

2.3.7

Fundus Autofluorescence

 

4.1.5

VEGF Activity . . . . . . . . . . . . . .

55

 

in Patients with Macular

28

4.2

Current Anti-VEGF Therapies

55

 

Holes . . . . . . . . . . . . . . . . . . . . . .

4.2.1

Aptamers: Pegaptanib

55

2.4

Wide-Field Contact Lens

28

 

Sodium (Macugen) . . . . . . . . .

 

System . . . . . . . . . . . . . . . . . . . .

4.2.2

Monoclonal Antibodies:

 

2.4.1

Introduction . . . . . . . . . . . . . . .

28

 

Ranibizumab (Lucentis) . . . . .

56

2.4.2

Materials and Methods . . . . .

29

4.2.3

Monoclonal Antibodies:

58

2.4.2.1

Structure of a Wide-Field

29

 

Bevacizumab (Avastin) . . . . . .

 

Contact Lens System . . . . . . . .

4.3

Anti-VEGF Therapy: Practical

60

2.4.2.2

Limit and Advantage of a

 

 

Considerations . . . . . . . . . . . . .

 

Wide-Field Contact Lens

29

4.3.1

Intravitreal Injection

60

 

System . . . . . . . . . . . . . . . . . . . .

 

Technique . . . . . . . . . . . . . . . . .

2.4.2.3

Technique for Performing

29

4.3.2

Safety Considerations . . . . . .

60

 

the Examination . . . . . . . . . . . .

4.3.3

Bevacizumab (Avastin)

 

2.4.3

Other Techniques

 

 

Preparation: Compounding

61

 

of Execution of Wide-field

 

 

Pharmacies . . . . . . . . . . . . . . . .

 

Fluorescein Angiograms . . . .

30

4.4

Future Anti-VEGF Therapies

61

2.4.4

Clinical Application . . . . . . . . .

31

4.4.1

VEGF Trap . . . . . . . . . . . . . . . . . .

61

Chapter 3

 

4.4.2

Small Interfering RNAs . . . . . .

62

 

4.4.3

Receptor Tyrosine Kinase

 

Genetics of Age-Related Macular

 

 

Inhibitors . . . . . . . . . . . . . . . . . .

63

Degeneration: Update

 

4.5

Conclusion . . . . . . . . . . . . . . . . .

64

Hendrik P.N. Scholl, Monika Fleckenstein,

Chapter 5

 

Peter Charbel Issa, Claudia Keilhauer, Frank

 

G. Holz, Bernhard H.F. Weber

 

Intravitreal Injections:

 

 

 

 

Techniques and Sequelae

 

3.1

Introduction:

35

Heinrich Heimann

 

 

Genetic Influence on AMD . .

5.1

Introduction

67

3.2

Analysis of Candidate Genes

36

 

for AMD . . . . . . . . . . . . . . . . . . .

5.2

Complications of Intravitreal

68

3.3

Linkage and Association

 

 

Injections . . . . . . . . . . . . . . . . . .

 

Studies in AMD . . . . . . . . . . . .

38

5.2.1

Methodology . . . . . . . . . . . . . .

69

3.4

Complement Factor H Gene

38

5.2.2

Perioperative Complications

69

3.5

LOC387715 . . . . . . . . . . . . . . . .

43

5.2.2.1

Conjunctival Hemorrhage . . .

69

3.6

Factor B . . . . . . . . . . . . . . . . . . .

44

5.2.2.2

Conjunctival Scarring . . . . . .

72

3.7

Gene–Gene

 

5.2.2.3

Pain . . . . . . . . . . . . . . . . . . . . . . .

72

 

and Gene–Environment

45

5.2.2.4

Punctate Keratitis

72

 

Interaction in AMD . . . . . . . . .

 

and Corneal Edema . . . . . . . . .

3.8

Conclusions . . . . . . . . . . . . . . . .

46

5.2.2.5

Vitreous Reflux . . . . . . . . . . . . .

72

Chapter 4

 

5.2.2.6

Traumatic Cataract . . . . . . . . .

72

 

5.2.2.7

Cataract Progression . . . . . . . .

73

Anti-VEGF Treatment for Age-

 

5.2.2.8

Retinal Perforation . . . . . . . . .

73

Related Macular Degeneration

 

5.2.2.9

Vitreous Floaters . . . . . . . . . . .

74

Todd R. Klesert, Jennifer I. Lim

 

5.2.2.10

Vitreous Hemorrhage . . . . . . .

74

 

 

 

5.2.2.11

Retinal Toxicity . . . . . . . . . . . . .

74

4.1

Basic Science . . . . . . . . . . . . . . .

53

5.2.2.12

Intraocular Inflammation . . . .

74

Contents XI

5.2.2.13 Uveitis and Pseudo-

endophthalmitis . . . . . . . . . . . 75

5.2.2.14 Endophthalmitis . . . . . . . . . . . 76

5.2.2.15 Retinal Artery and Vein

Occlusion . . . . . . . . . . . . . . . . . . 78

5.2.2.16 Retinal Detachment . . . . . . . . 78

5.2.2.17 Acute Rise in Intraocular

Pressure . . . . . . . . . . . . . . . . . . . 79

5.2.2.18 Ocular Hypertension and

Glaucoma . . . . . . . . . . . . . . . . . 79

5.3Surgical Technique

for Intravitreal Injection . . . . . 80

5.3.1Guidelines and Preferred

Practice Survey . . . . . . . . . . . . . 81

5.3.2Preoperative Assessment

 

and Preparation . . . . . . . . .

. .. ..

81

5.3.2.1

Concomitant Eye Diseases

81

5.3.2.2

Preoperative Assessment

. . .

81

5.3.2.3Preoperative Medication . . . . 81

5.3.2.4 Location . . . . . . . . . . . . . . . . . . . 81

5.3.2.5Preparation of the Eye and

Ocular Adnexa . . . . . . . . . . . . . 81

5.3.2.6Preparation of the Surgeon . . 84

5.3.2.7Preparation of the Drug . . . . . 84

5.3.3

Injection . . . . . . . . . . . . . . . . . . .

84

5.3.3.1

Syringe and Needle . . . . . . . . .

84

5.3.3.2Position of the Injection . . . . . 84

5.3.3.3 Entry Path . . . . . . . . . . . . . . . . .

84

5.3.3.4Advancement of Needle and

 

Injection . . . . . . . . . . . . . . . . .

. . 84

5.3.4

Postoperative Assessment

. . 84

5.3.4.1Assessment Immediately

 

Following the Injection

. . . . .

84

5.3.4.2

Topical Therapy . . . . . . .

. .. .. .. ..

85

5.3.4.3

Follow-up Examinations

85

Chapter 6

Combination Therapies for Choroidal Neovascularization

Richard F. Spaide

6.1

Introduction . . . . . . . . . . . .

. . . 90

6.2

Angiogenesis . . . . . . . . . . .

. . . 90

6.2.1

Development of CNV . . . .

. . . 91

6.2.2

Cancer and Angiogenesis

. . . 91

6.3Normalization of Tumor

Vasculature . . . . . . . . . . . . . . . . 92

6.4Two-Component Model of

CNV . . . . . . . . . . . . . . . . . . . . . . .

94

6.5Two-Component Model and

Therapy . . . . . . . . . . . . . . . . . . . 94

6.5.1Are There Cytokines to Block

 

Other Than VEGF? . . . . . . . . . .

95

6.6

Combination Therapies . . . . .

96

6.6.1

Anti-VEGF Biologics

 

 

and Photodynamic Therapy .

96

6.6.2

Anecortave Acetate

 

 

and Photodynamic Therapy .

97

6.6.3Intravitreal Triamcinolone

and Photodynamic Therapy . 97

6.6.4Triamcinolone and Anti-

VEGF Therapy . . . . . . . . . . . . . . 97

6.6.5Triamcinolone

 

and Anecortave Acetate

. . . . 98

6.7

Conclusion . . . . . . . . . . . . .

. . . . 99

Chapter 7

Nutritional Supplementation in Agerelated Macular Degeneration

Hanna R. Coleman, Emily Y. Chew

7.1

Introduction . . . . . . . . . . . . . .

105

7.2

Risk Factors . . . . . . . . . . . . . . .

105

7.3Age-Related Eye Disease

 

Study . . . . . . . . . . . . . . . . . . . . .

106

7.4

Lutein/Zeaxanthin . . . . . . . . .

106

7.5

Zinc . . . . . . . . . . . . . . . . . . . . . .

106

7.6

Vitamin E . . . . . . . . . . . . . . . . .

107

7.7

Dietary Fat Intake . . . . . . . . . .

107

7.8Age-Related Eye Disease

 

Study 2 . . . . . . . . . . . . . . . . . . .

107

7.9

Conclusion . . . . . . . . . . . . . . . .

108

Chapter 8

New Perspectives in Geographic Atrophy Associated with AMD

Steffen Schmitz-Valckenberg, Monika

Fleckenstein, Hendrik P.N. Scholl, Frank G.

Holz

8.1

Introduction . . . . . . . . . . . . . .

114

8.1.1

Basics . . . . . . . . . . . . . . . . . . . .

114

8.1.2Development and Spread of

Atrophy . . . . . . . . . . . . . . . . . . 115

8.2Fundus Autofluorescence

Imaging in Geographic

 

Atrophy . . . . . . . . . . . . . . . . . .

116

8.3Quantification of Atrophy

Progression . . . . . . . . . . . . . . .

117

XII Contents

8.4

Risk Factors . . . . . . . . . . . . . . .

118

9.8.2.2

Aldose Reductase and AGE

 

8.4.1

Genetic Factors . . . . . . . . . . .

118

 

Inhibitors . . . . . . . . . . . . . . . . .

136

8.4.2

Systemic Risk Factors . . . . . .

118

9.8.2.3

Antioxidants . . . . . . . . . . . . . .

136

8.4.3

Ocular Risk Factors . . . . . . . .

119

9.8.3

A Team Approach

 

8.5

Development of CNV in Eyes

122

 

to the Prevention of Loss

 

 

with GA . . . . . . . . . . . . . . . . . .

 

of Vision in People with

137

8.6

Visual Function in GA

123

 

Diabetes . . . . . . . . . . . . . . . . . .

 

Patients . . . . . . . . . . . . . . . . . .

9.8.4

Local Ophthalmic

138

8.6.1

Measurement of Visual

 

 

Treatment . . . . . . . . . . . . . . . .

 

Acuity . . . . . . . . . . . . . . . . . . . .

123

9.8.4.1

Focal Macular Laser . . . . . . . .

138

8.6.2

Contrast Sensitivity . . . . . . . .

124

9.8.4.2

Grid Macular Laser . . . . . . . . .

138

8.6.3

Reading Speed . . . . . . . . . . . .

124

9.8.4.3

Recent Trends in Macular

 

8.6.4

Fundus Perimetry . . . . . . . . .

124

 

Laser Therapy . . . . . . . . . . . . .

138

 

 

 

9.8.4.4

Micropulsed, Sub-threshold

 

Chapter 9

 

 

“Selective” Laser Therapy . . .

139

Diabetic Macular Edema:

 

9.8.4.5

Vitrectomy . . . . . . . . . . . . . . . .

139

Current Treatments

 

9.8.4.6

Intravitreal Steroids . . . . . . . .

139

Florian K.P. Sutter, Mark C. Gillies, Horst

9.8.4.7

Periocular Steroids . . . . . . . .

140

Helbig

 

 

9.8.4.8

Intravitreal Anti-VEGF

140

 

 

 

 

Antibodies . . . . . . . . . . . . . . . .

9.1

Introduction . . . . . . . . . . . . . .

131

9.8.4.9

Cataract Surgery . . . . . . . . . .

141

9.2

Epidemiology . . . . . . . . . . . . .

131

9.9

Current Clinical Practice/

 

9.3

Pathophysiology . . . . . . . . . .

132

 

Recommendations . . . . . . . .

141

9.4Diabetic Macular Edema and

 

Laboratory Science . . . . . . . .

132

Chapter 10

 

9.5

Quality of Life . . . . . . . . . . . . .

133

Treatment of Retinal Vein Occlusions

9.6

Diagnosis and Screening . . .

133

Rajeev S. Ramchandran, R. Keith Shuler,

9.7

Types of Diabetic Macular

134

Sharon Fekrat

 

 

Edema . . . . . . . . . . . . . . . . . . . .

 

 

147

9.7.1

Clinically Significant Macular

 

10.1

Introduction . . . . . . . . . . . . . .

 

Edema . . . . . . . . . . . . . . . . . . . .

134

10.2

Pathophysiology . . . . . . . . . .

148

9.7.2

Focal Diabetic Macular

134

10.3

Branch and Central Vein

148

 

Edema . . . . . . . . . . . . . . . . . . . .

 

Occlusion Studies . . . . . . . . .

9.7.3

Diffuse Diabetic Macular

134

10.3.1

Background . . . . . . . . . . . . . . .

148

 

Edema . . . . . . . . . . . . . . . . . . . .

10.3.2

Branch Vein Occlusion

 

9.7.4

Cystoid Macular Edema . . . .

134

 

Study . . . . . . . . . . . . . . . . . . . . .

149

9.7.5

Ischemic Macular Edema . .

134

10.3.3

Central Vein Occlusion

149

9.7.6

OCT Patterns of Diabetic

134

 

Study . . . . . . . . . . . . . . . . . . . . .

 

Macular Edema . . . . . . . . . . .

10.4

Systemic Pharmacologic

 

9.8

Treatment . . . . . . . . . . . . . . . .

135

 

Treatments . . . . . . . . . . . . . . .

150

9.8.1

Systemic Treatment . . . . . . . .

135

10.5

Targeting Macular Edema . .

151

9.8.1.1

Glycemic Control . . . . . . . . . .

135

10.6

Intravitreal

 

9.8.1.2

Blood Pressure Control . . . . .

135

 

Pharmacotherapy . . . . . . . . .

151

9.8.1.3

Reducing Levels of Blood

135

10.6.1

Background . . . . . . . . . . . . . . .

151

 

Lipids . . . . . . . . . . . . . . . . . . . .

10.6.2

Intravitreal Triamcinolone:

153

9.8.1.4

Treatment of Renal

 

 

BRVO . . . . . . . . . . . . . . . . . . . . .

 

Dysfunction and Anemia . . .

136

10.6.3

Intravitreal Triamcinolone:

 

9.8.1.5

Smoking . . . . . . . . . . . . . . . . . .

136

 

CRVO . . . . . . . . . . . . . . . . . . . . .

153

9.8.2

Systemic Pharmacotherapy

136

10.6.4

Fluocinolone Acetonide

 

9.8.2.1

PKC-ß Inhibitors . . . . . . . . . . .

136

 

Intravitreal Implant . . . . . . . .

153