- •Foreword
- •List of contributors
- •Preface
- •Dedication and Acknowledgments
- •Evolving knowledge in pharmacologic treatments
- •MEDICAL TREATMENT
- •VERTEPORFIN
- •ANTI-VEGF TREATMENT
- •OTHER MEDICAL TREATMENTS
- •“PLAYERS” IN OCULAR TREATMENT
- •THE DRUG
- •ROUTE OF ADMINISTRATION
- •Eye drops
- •Soluble ophthalmic drug inserts
- •Ion drug exchange
- •Intravitreal injections
- •Systemic administration
- •Sustained drug delivery system
- •Intraocular implants
- •Microparticles and nanoparticles
- •Liposomes
- •Encapsulated cell technology (ECT)
- •Iontophoresis
- •REFERENCES
- •SECTION 1: Basic Sciences in Retina
- •Retinal anatomy and pathology
- •INTRODUCTION
- •KEY CONCEPTS AND FUNDAMENTALS
- •NORMAL RETINAL ANATOMY
- •RETINAL PATHOLOGY
- •Congenital abnormalities
- •Dystrophies
- •Degenerations
- •Vascular diseases
- •Toxicities
- •Inflammatory diseases
- •Neoplasms
- •Retinal detachment
- •Trauma
- •Involvement of systemic diseases
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •Retinal biochemistry, physiology, and cell biology
- •INTRODUCTION
- •VITREOUS BIOCHEMISTRY
- •VITREOUS DEGENERATION WITH AGING
- •PHYSIOLOGICAL AND PATHOLOGICAL CHANGES IN THE VITREORETINAL INTERFACE
- •BLOOD–RETINAL BARRIER
- •TIGHT JUNCTIONS
- •BLOOD–RETINA BARRIER DISRUPTION
- •MECHANISMS OF RETINAL ARTERIOLAR CALIBER CHANGES
- •MECHANISMS OF RETINAL VENULAR CALIBER CHANGES
- •MACULAR PIGMENTS
- •FUNCTIONS OF MACULAR PIGMENTS
- •Antioxidant
- •Optical filter
- •VISUAL CYCLE
- •RETINOID CYCLE
- •Outer segment of photoreceptors
- •Retinal pigment epithelium
- •Re-entry into the outer segment
- •Chaperones
- •PHOTOTRANSDUCTION
- •Activation
- •Inactivation
- •RETINAL PIGMENT EPITHELIUM AND LIPOFUSCIN
- •RETINAL PIGMENT EPITHELIUM
- •LIPOFUSCIN
- •Formation of lipofuscin
- •Lipofuscin and RPE atrophy
- •Stargardt’s disease and lipofuscin
- •Age-related macular degeneration and lipofuscin
- •MATRIX BIOLOGY
- •STRUCTURAL COMPOSITION OF THE BRUCH’S MEMBRANE
- •MACROSCOPIC CHANGES OF THE BRUCH’S MEMBRANE
- •CELL BIOLOGY OF BRUCH’S MEMBRANE
- •LIPID ACCUMULATION
- •MATRIX DYSREGULATION
- •MATRIX METALLOPROTEINASES
- •PHARMACOTHERAPY IMPLICATIONS
- •REFERENCES
- •INTRODUCTION
- •PROMOTERS OF ANGIOGENESIS
- •VEGF in physiologic and pathologic angiogenesis
- •Investigational approaches to VEGF inhibition in ocular neovascularization
- •RNA interference
- •Soluble VEGFR fusion protein: VEGF-Trap
- •Anecortave acetate
- •PLATELET-DERIVED GROWTH FACTOR
- •FIBROBLAST GROWTH FACTOR 2 (FGF2)
- •TUMOR NECROSIS FACTOR-α (TNF-α)
- •EPHS AND EPHRINS
- •NOTCH
- •ANGIOPOIETINS
- •Angiopoietin 1
- •Angiopoietin 2
- •ERYTHROPOIETIN
- •MATRIX METALLOPROTEINASES
- •INTEGRINS
- •COMPONENTS OF THE COMPLEMENT CASCADE
- •INHIBITORS OF ANGIOGENESIS
- •PIGMENT EPITHELIUM-DERIVED FACTOR
- •SOLUBLE VEGF RECEPTOR 1
- •VEGFXXXb ISOFORMS
- •COMPLEMENTARY REGULATORY PROTEIN C59
- •TRYPTOPHANYL-tRNA SYNTHASE FRAGMENT
- •OTHER INHIBITORS
- •SUMMARY
- •REFERENCES
- •Ocular immunity and inflammation
- •INTRODUCTION
- •HISTORY
- •KEY CONCEPTS AND FUNDAMENTALS IN MOLECULAR BIOLOGY AND BIOCHEMISTRY
- •INNATE IMMUNITY
- •ADAPTIVE IMMUNITY
- •MECHANISMS OF PATHOGENESIS
- •NONINFECTIOUS POSTERIOR AND PANUVEITIS
- •INFECTIOUS RETINITIS AND CHOROIDITIS
- •AGE-RELATED MACULAR DEGENERATION
- •DIABETIC RETINOPATHY
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •INTRODUCTION
- •HISTORY
- •KEY CONCEPTS IN COMPLEMENT BIOLOGY
- •SUMMARY
- •REFERENCES
- •Genetics of retinal disease
- •INTRODUCTION
- •HISTORY OF RETINAL GENE DISCOVERY
- •KEY CONCEPTS AND FUNDAMENTS OF GENETIC METHODS IN THE STUDY OF RETINAL DISEASE
- •GENETICS: ILLUMINATING MECHANISMS OF PATHOGENESIS, REVEALING COMPLEXITY
- •RP: A “COMPLEX” MONOGENIC DISEASE
- •SHEDDING LIGHT ON AMD
- •DELIVERY OF GENES TO TARGET PATHOGENIC PATHWAYS
- •GENE-INDEPENDENT THERAPY
- •SUMMARY: THE FUTURE IS BRIGHT
- •REFERENCES
- •SECTION 2: Animal Models and Routes for Retinal Drug Delivery
- •Vitamins and supplements for age-related macular degeneration
- •INTRODUCTION
- •HISTORY
- •KEY CONCEPTS AND PHARMACOLOGY OF CURRENT DIETARY SUPPLEMENTS
- •EPIDEMIOLOGIC DATA OF ASSOCIATION OF FAT AND ω-3 LCPUFAs WITH AMD
- •AVAILABLE SUPPLEMENTS FOR MACULAR DEGENERATION
- •IMPLICATIONS OF RETINAL SUPPLEMENT PHARMACOLOGY
- •FUTURE DIRECTIONS: AREDS2
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •Ocular pharmacokinetic, drug bioavailability, and intraocular drug delivery systems
- •INTRODUCTION
- •INTRAVITREAL ADMINISTRATION
- •OCULAR PHARMACOKINETICS
- •TOPICAL FORMULATIONS
- •CONVENTIONAL FORMULATIONS
- •INTRAOCULAR DRUG DELIVERY SYSTEMS
- •NONBIODEGRADABLE IMPLANTS
- •INTRAOCULAR BIODEGRADABLE DRUG DELIVERY SYSTEMS
- •ACKNOWLEDGMENTS
- •REFERENCES
- •INTRODUCTION
- •THE RATIONALE FOR INTRAVITREAL DRUG DELIVERY
- •HISTORY
- •KEY CONCEPTS AND FUNDAMENTAL POINTS IN RETINAL DRUG DELIVERY
- •STRATEGIES AND IMPLICATIONS FOR RETINAL PHARMACOTHERAPY
- •PREOPERATIVE PREPARATION
- •PROPHYLAXIS OF ENDOPHTHALMITIS: LOCAL DISINFECTION AND TOPICAL ANTIBIOTIC THERAPY
- •LOCAL TOPICAL ANESTHESIA
- •SURGICAL TECHNIQUES FOR RETINAL DRUG DELIVERY
- •THE PROCEDURE AND RECOMMENDED TECHNIQUE
- •COMPLICATIONS WITH THE ROUTE FOR DRUG DELIVERY
- •OCULAR COMPLICATIONS
- •PHARMACOKINETICS AND CLEARANCE OF INTRAVITREAL DRUGS
- •PHARMACOKINETICS OF INTRAVITREAL CRYSTALLINE TRIAMCINOLONE ACETONIDE
- •CLINICAL EXPERIENCE AND RESULTS IN VITRECTOMIZED, AIR-FILLED, OR SILICONE OIL EYES
- •VITRECTOMIZED EYES
- •Silicone oil tamponade
- •Gas tamponade
- •PREOPERATIVE DRUG APPLICATIONS
- •INTRAOPERATIVE DRUG APPLICATIONS
- •POSTOPERATIVE DRUG APPLICATIONS
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •INTRODUCTION
- •HISTORY
- •KEY CONCEPTS
- •ANIMAL MODELS
- •DRUG DELIVERY MODALITIES
- •TOPICAL DRUG DELIVERY
- •TRANSSCLERAL DRUG DELIVERY
- •SUPRACHOROIDAL DRUG DELIVERY
- •INTRAVITREAL GAS-PHASE NANOPARTICLE DRUG DELIVERY
- •SUMMARY AND KEY POINTS
- •ACKNOWLEDGMENT
- •REFERENCES
- •INTRODUCTION
- •HISTORY
- •KEY CONCEPTS AND FUNDAMENTAL POINTS IN SUSTAINED-RELEASE DRUG DELIVERY
- •EXISTING SUSTAINED-RELEASE DRUG DEVICES
- •BIODEGRADABLE POLYMER IMPLANTS
- •LIPOSOME ENCAPSULATION
- •CELLULAR ENCAPSULATION
- •THE FUTURE
- •SUMMARY
- •ACKNOWLEDGMENT
- •REFERENCES
- •INTRODUCTION
- •PERMEATION BARRIERS AND ANATOMICAL CONSIDERATIONS
- •THEORETICAL BACKGROUND
- •CYCLODEXTRINS
- •ANIMAL TESTING OF ROUTES OF DRUG DELIVERY
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •Thermo-sensitive hydrogels
- •INTRODUCTION
- •DELIVERY CHARACTERISTICS
- •POTENTIAL DELIVERY SITE
- •TOXICITY TESTING
- •FUTURE DIRECTION
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •Retina and ocular toxicity to ocular application of drugs
- •INTRODUCTION
- •HISTORY
- •MAJOR CLASSES OF DRUGS AND THEIR SAFETY PROFILE AFTER LOCAL OCULAR APPLICATION FOR RETINA THERAPY
- •CORTICOSTEROIDS
- •ANTIBIOTICS
- •NONSTEROIDAL ANTI-INFLAMMATORY DRUGS
- •ENZYMES AND FIBRINOLYTICS
- •MISCELLANEOUS ANTI-INFLAMMATORY AND ANTIANGIOGENIC AGENTS
- •Summary and Key points
- •ACKNOWLEDGMENTS
- •REFERENCES
- •INTRODUCTION
- •KEY CONCEPTS AND FUNDAMENTALS
- •PHARMACOLOGY, BIOCHEMISTRY, AND TYPE OF IMPACT ON THE RETINA
- •DISRUPTION OF THE RETINA AND RETINAL PIGMENT EPITHELIUM
- •Phenothiazines
- •Thioridazine
- •Chlorpromazine
- •Chloroquine derivatives
- •Chloroquine
- •Hydroxychloroquine
- •Quinine sulfate
- •Clofazimine
- •2′,3′-dideoxyinosine (DDI)
- •Deferoxamine
- •Corticosteroid preparations
- •Cisplatin and BCNU (carmustine)
- •Potassium iodate
- •VASCULAR DAMAGE OR OCCLUSION
- •Quinine sulfate
- •Cisplatin and BCNU (carmustine)
- •Talc
- •Oral contraceptives
- •Aminoglycoside antibiotics
- •Interferon
- •Miscellaneous agents
- •CYSTOID MACULAR EDEMA AND RETINAL EDEMA/FOLDS
- •CYSTOID MACULAR EDEMA
- •Epinephrine and dipivefrin
- •Nicotinic acid
- •Prostaglandin analogues
- •Retinal edema/folds
- •Sulfa antibiotics, acetazolamide, ethoxyzolamide, chlorthalidone, hydrochlorothiazide, triamterene, metronidazole
- •Topiramate
- •CRYSTALLINE RETINOPATHY
- •TAMOXIFEN
- •CANTHAXANTHINE
- •METHOXYFLURANE
- •TALC
- •NITROFURANTOIN
- •UVEITIS
- •RIFABUTIN
- •CIDOFOVIR
- •LATANOPROST
- •CARDIAC GLYCOSIDES
- •SILDENAFIL
- •METHANOL
- •VIGABATRIN
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •INTRODUCTION
- •DISEASE PREVALENCE AND INFLUENCE
- •RISK FACTORS
- •ETIOLOGY/PATHOGENESIS
- •SIGNS AND SYMPTOMS
- •TREATMENT OPTIONS
- •VITAMIN C
- •CAROTENOIDS
- •VITAMIN E
- •MINERALS
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •Neovascular age-related macular degeneration
- •DISEASE PREVALENCE AND INFLUENCE
- •RISK FACTORS
- •ETIOLOGY/PATHOGENESIS
- •NATURAL HISTORY
- •NONPHARMACOLOGIC THERAPIES
- •PHARMACOLOGIC THERAPIES
- •PDT WITH VERTEPORFIN
- •PEGAPTANIB
- •RANIBIZUMAB
- •BEVACIZUMAB
- •COMBINATION THERAPY
- •TREATMENTS UNDER INVESTIGATION
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •Diabetic retinopathy and diabetic macular edema
- •INTRODUCTION
- •DIABETIC RETINOPATHY PREVALENCE
- •RISK FACTORS
- •ETIOLOGY AND PATHOGENESIS
- •SIGNS AND SYMPTOMS
- •TREATMENT OPTIONS
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •Retinal vein occlusion
- •INTRODUCTION
- •DISEASE PREVALENCE
- •RISK FACTORS
- •PATHOGENESIS
- •CENTRAL RETINAL VEIN OCCLUSION
- •BRANCH RETINAL VEIN OCCLUSION
- •TREATMENT OPTIONS
- •CENTRAL RETINAL VEIN OCCLUSION
- •BRANCH RETINAL VEIN OCCLUSION
- •TREATMENT OUTCOMES AND PROGNOSIS
- •CENTRAL RETINAL VEIN OCCLUSION
- •TISSUE PLASMINOGEN ACTIVATOR (tPA)
- •CORTICOSTEROIDS
- •BEVACIZUMAB
- •OTHER MEDICATIONS
- •Ranimizumab
- •Coumadin (warfarin)
- •Urokinase
- •Troxerutin
- •Ticlodipine
- •Pentoxifylline
- •Hemodilution
- •Laser treatment
- •Chorioretinal venous anastomosis
- •SURGICAL TREATMENT OF CRVO
- •Radial optic neurotomy (ron)
- •Branch retinal vein occlusion
- •Corticosteroids
- •Bevacizumab
- •Ranimizumab
- •Laser treatment
- •SURGICAL TREATMENT OF BRVO
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •Retinal detachment and proliferative vitreoretinopathy
- •INTRODUCTION
- •INCIDENCE OF RETINAL DETACHMENT
- •ETIOLOGY AND RISK FACTORS FOR RETINAL DETACHMENT
- •RISK FACTORS FOR PROLIFERATIVE VITREORETINOPATHY
- •SIGNS, SYMPTOMS, AND DIAGNOSIS
- •TREATMENT OPTIONS
- •PROGNOSIS WITH THE VARIOUS TREATMENT OPTIONS
- •ADJUNCTIVE THERAPIES
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •Posterior Uveitis
- •INTRODUCTION
- •DISEASE PREVALENCE AND INFLUENCE
- •RISK FACTORS
- •PATHOGENESIS
- •SPECIFIC DISEASES: DIAGNOSIS AND PHARMACOTHERAPY
- •ADAMANTIADES–BEHÇET DISEASE
- •Diagnostic features
- •Treatment modalities
- •BIRDSHOT RETINOCHOROIDOPATHY
- •Diagnostic features
- •Treatment modalities
- •Treatment modalities
- •SARCOIDOSIS
- •Diagnostic features
- •Treatment modalities
- •SERPIGINOUS CHOROIDOPATHY
- •Diagnostic features
- •Treatment modalities
- •VOGT–KOYANAGI–HARADA SYNDROME
- •Diagnostic features
- •Treatment modalities
- •SYMPATHETIC OPHTHALMIA
- •Diagnostic features
- •Treatment modalities
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •INTRODUCTION
- •DISEASE PREVALENCE
- •RISK FACTORS
- •MYOPIA
- •PRESUMED OCULAR HISTOPLASMOSIS SYNDROME
- •OTHER INFLAMMATORY CAUSES
- •ANGIOID STREAKS
- •IDIOPATHIC CNV
- •ETIOLOGY AND PATHOGENESIS
- •DIAGNOSIS AND ANCILLARY TESTING
- •MYOPIA
- •PRESUMED OCULAR HISTOPLASMOSIS SYNDROME
- •ANGIOID STREAKS
- •INFLAMMATORY CAUSES
- •DIFFERENTIAL DIAGNOSIS
- •CLINICAL SIGNS AND SYMPTOMS
- •MYOPIA
- •PRESUMED OCULAR HISTOPLASMOSIS SYNDROME
- •ANGIOID STREAKS
- •INFLAMMATORY CAUSES
- •TREATMENT
- •PHOTODYNAMIC THERAPY
- •SURGICAL THERAPY
- •ANTIANGIOGENIC THERAPY
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •INTRODUCTION
- •DISEASE INCIDENCE
- •RISK FACTORS
- •ETIOLOGY/PATHOGENESIS
- •SIGNS AND SYMPTOMS
- •OCULAR
- •SYSTEMIC
- •TREATMENT OPTIONS
- •SUMMARY AND KEY POINTS
- •ACKNOWLEDGMENTS
- •REFERENCES
- •Retinopathy of prematurity
- •INTRODUCTION
- •DISEASE PREVALENCE AND INFLUENCE
- •RISK FACTORS
- •ETIOLOGY/PATHOGENESIS
- •ABNORMAL RETINAL VASCULARIZATION IN ROP
- •ROLE OF GROWTH FACTORS IN ROP
- •DIAGNOSIS AND ANCILLARY TESTING/DIFFERENTIAL DIAGNOSIS
- •SIGNS AND SYMPTOMS
- •CLASSIFICATION OF RETINOPATHY OF PREMATURITY
- •TREATMENT OPTIONS FOR RETINOPATHY OF PREMATURITY
- •CRYOTHERAPY AND LASER THERAPY
- •INTRAVITREAL ANTI-VEGF THERAPY FOR ROP
- •Rationale for Treatment
- •Injection Technique
- •Patients
- •Results
- •Other Reported Results
- •Concerns with Intravitreal Anti-VEGF Therapy for ROP
- •Ocular complications
- •Systemic Complications
- •Vitrectomy
- •SUMMARY
- •REFERENCES
- •Idiopathic macular telangiectasia
- •INTRODUCTION
- •THERAPY
- •NONPROLIFERATIVE STAGE
- •PROLIFERATIVE STAGE
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •Neovascular glaucoma
- •INTRODUCTION
- •DISEASE PREVALENCE AND INFLUENCE
- •RISK FACTORS
- •ETIOLOGY/PATHOGENESIS
- •CENTRAL RETINAL VEIN OCCLUSION
- •DIABETIC RETINOPATHY
- •DIABETIC NEOVASCULAR GLAUCOMA
- •CAROTID ARTERY OCCLUSIVE DISEASE
- •CENTRAL RETINAL ARTERY OCCLUSION
- •INTRAOCULAR TUMORS
- •Malignant melanoma
- •Retinoblastoma
- •MISCELLANEOUS CAUSES
- •DIAGNOSIS AND ANCILLARY TESTING
- •DIFFERENTIAL DIAGNOSIS
- •SIGNS AND SYMPTOMS
- •TREATMENT OPTIONS
- •TREATMENT OF THE UNDERLYING DISEASE ASSOCIATED WITH NVG
- •Central retinal vein occlusion
- •Diabetic retinopathy
- •Carotid artery occlusive disease
- •Central retinal artery occlusion
- •PHARMACOLOGIC THERAPIES
- •Medical treatment to control high IOP
- •Anti-VEGF therapy
- •Corticosteroid therapy
- •Photodynamic therapy
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •INTRODUCTION
- •SPECIFIC DISEASES
- •RETINITIS PIGMENTOSA
- •Nutrients and retinitis pigmentosa
- •Cystoid Macular Edema (CME) associated with RP
- •Ciliary Neurotrophic Factor and retinitis pigmentosa
- •REFSUM’S DISEASE
- •Treatment
- •Dietary restriction
- •Plasmapheresis
- •GYRATE ATROPHY
- •Treatment
- •Arginine-restricted diet
- •Vitamin B6 supplementation
- •ABETALIPOPROTEINEMIA (BASSEN–KORNZWEIG SYNDROME)
- •Treatment
- •LEBER CONGENITAL AMAUROSIS
- •Treatment
- •RPE65 gene therapy
- •X-LINKED JUVENILE RETINOSCHISIS
- •Treatment
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •SECTION 4: Drugs and Mechanisms in Retinal Diseases
- •Nonsteroidal anti-inflammatory drugs (NSAIDs) in the treatment of retinal diseases
- •KEY FEATURES
- •INTRODUCTION AND HISTORY
- •PHARMACOLOGY, DRUG MECHANISM, AND EFFECTS
- •DICLOFENAC
- •KETOROLAC
- •NEVANAC
- •BROMFENAC
- •DICLOFENAC
- •KETOROLAC
- •NEPAFENAC
- •BROMFENAC
- •CONTRAINDICATIONS, COMPLICATIONS, AND TOXICITY
- •SUMMARY AND KEY POINTS
- •ACKNOWLEDGMENTS
- •REFERENCES
- •KEY FEATURES
- •INTRODUCTION
- •PHARMACOLOGY
- •STRUCTURE
- •METABOLISM
- •Dexamethasone
- •Fluocinolone
- •CYSTOID MACULAR EDEMA
- •DIABETIC MACULAR EDEMA
- •RETINAL VEIN OCCLUSION
- •EXUDATIVE AGE-RELATED MACULAR DEGENERATION (AMD)
- •Raised intraocular pressure
- •Infectious, sterile, and pseudoendophthalmitis associated with triamcinolone acetonide
- •Cataract
- •Retinal detachment
- •FUTURE CONSIDERATIONS AND ONGOING STUDIES
- •THE SCORE STUDY
- •STEROID-SUSTAINED RELEASE DEVICES
- •The STRIDE study
- •FLUOCINOLONE ACETONIDE DEVICE
- •NEW-GENERATION FLUOCINOLONE DEVICE
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •Anecortave acetate
- •KEY FEATURES
- •INTRODUCTION AND HISTORY
- •PHARMACOLOGY
- •DRUG MECHANISM
- •DRUG EFFECTS IN RETINAL DISEASES
- •PRECLINICAL STUDIES
- •Retinopathy of prematurity
- •Intraocular tumors
- •Choroidal neovascularization
- •CLINICAL STUDIES
- •Exudative AMD
- •Other diseases
- •EFFICACY AND COMPARISON WITH OTHER AGENTS
- •CONTRAINDICATIONS
- •OCULAR COMPLICATIONS AND TOXICITY
- •SYSTEMIC COMPLICATIONS AND TOXICITY
- •DRUG INTERACTIONS
- •SUMMARY AND KEY POINTS
- •ACKNOWLEDGMENTS
- •REFERENCES
- •KEY FEATURES
- •INTRODUCTION AND HISTORY
- •PHARMACOLOGY
- •DRUG MECHANISM
- •DRUG USE IN RETINAL DISEASES
- •AGE-RELATED MACULAR DEGENERATION
- •DIABETIC RETINOPATHY
- •RETINAL VEIN OCCLUSION (RVO)
- •UVEITIC CYSTOID MACULAR EDEMA (CME)
- •RETINOPATHY OF PREMATURITY (ROP)
- •RETINAL TELANGIECTASIAS
- •NEOVASCULAR GLAUCOMA (NVG)
- •OTHERS
- •CONTRAINDICATIONS
- •OCULAR COMPLICATIONS AND TOXICITY
- •SYSTEMIC COMPLICATION AND TOXICITY
- •DRUG INTERACTIONS
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •KEY FEATURES
- •INTRODUCTION AND HISTORY
- •PHARMACOLOGY
- •PHARMACOLOGICAL DESIGN
- •PHARMACOKINETICS
- •PHARMACODYNAMICS
- •DRUG MECHANISM
- •DRUG USE IN RETINAL DISEASES
- •EFFICACY
- •EFFICACY IN AMD
- •EFFICACY IN OTHER RETINAL DISEASES
- •CONTRAINDICATIONS
- •OCULAR COMPLICATIONS AND TOXICITY
- •DRUG INTERACTIONS
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •Pathophysiology of vascular endothelial growth factor and other angiogenic molecules
- •KEY FEATURES
- •INTRODUCTION
- •BIOLOGICAL EFFECTS OF VEGF-A
- •VEGF-A ISOFORMS
- •VEGF RECEPTORS
- •ROLE OF VEGF-A IN INTRAOCULAR NEOVASCULAR SYNDROMES
- •INTRAVITREAL ANTI-VEGF THERAPY FOR NEOVASCULAR AMD: PEGAPTANIB, RANIBIZUMAB AND BEVACIZUMAB
- •OTHER ANTI-VEGF THERAPIES IN CLINICAL DEVELOPMENT FOR AMD
- •OTHER ANGIOGENIC FACTORS
- •FIBROBLAST GROWTH FACTOR FAMILY
- •PLACENTAL GROWTH FACTOR
- •DELTA-LIKE LIGAND 4
- •SUMMARY AND KEYPOINTS
- •REFERENCES
- •KEY FEATURES
- •INTRODUCTION
- •TUMOR NECROSIS FACTOR-ALPHA ANTAGONISTS
- •INFLIXIMAB (REMICADE)
- •Pharmacology and mechanism
- •Systemic indications for infliximab
- •Ophthalmic indications for infliximab
- •Contraindications
- •Ocular complications and toxicity
- •Systemic complications and toxicity
- •Drug interactions
- •Summary
- •ADALIMUMAB (HUMIRA)
- •Pharmacology and mechanism
- •Systemic indications
- •Ophthalmic indications
- •Contraindications
- •Ocular toxicity
- •Systemic toxicity
- •Drug interactions
- •Summary
- •ETANERCEPT (ENBREL)
- •Pharmacology and mechanism
- •Systemic indications
- •Ophthalmic indications
- •Contraindications
- •Ocular toxicity
- •Systemic toxicity
- •Drug interactions
- •Summary
- •INTERLEUKIN-2 RECEPTOR ANTAGONIST
- •DACLIZUMAB (ZENAPAX)
- •Pharmacology and mechanism
- •Systemic indication
- •Ophthalmic indications
- •Contraindications
- •Ocular toxicity
- •Systemic toxicity
- •Drug interactions
- •Summary
- •OTHER BIOLOGIC AGENTS
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •KEY FEATURES
- •CALCINEURIN INHIBITORS
- •CICLOSPORIN (CYCLOSPORIN: CsA)
- •Key features, introduction, and history
- •Pharmacology
- •Drug effects in human nonocular diseases
- •Drug use in retinal diseases
- •Pediatric case series
- •EFFICACY AND COMPARISON WITH OTHER AGENTS
- •Ciclosporin versus tacrolimus
- •TACROLIMUS
- •Key features, introduction, and history
- •Pharmacology
- •Drug effects in human nonocular diseases
- •Drug use in retinal diseases
- •Summary and key points
- •ANTIMETABOLITES
- •MYCOPHENOLATE MOFETIL (MMF)
- •Key features, introduction, and history
- •Pharmacology
- •Drug mechanism
- •Drug effects in human nonocular diseases
- •Drug use in retinal diseases
- •Pediatric case series
- •METHOTREXATE
- •Key features, introduction, and history
- •Pharmacology
- •Drug mechanism
- •Drug effects in human nonocular diseases
- •Drug use in retinal diseases
- •Pediatric case series
- •Intravitreal methotrexate injection
- •AZATHIOPRINE
- •Key features, introduction, and history
- •Pharmacology
- •Drug mechanism
- •Drug effects in human nonocular diseases
- •Drug use in retinal diseases
- •Pediatric case series
- •Summary and key points
- •ALKYLATING AGENTS
- •CYCLOPHOSPHAMIDE
- •Key features, introduction, and history
- •Pharmacology
- •Drug effects in human nonocular diseases
- •Drug use in retinal diseases
- •Efficacy and comparison with other agents
- •CHLORAMBUCIL
- •Key features, introduction, and history
- •Pharmacology
- •Drug effects in human nonocular diseases
- •Drug use in retinal diseases
- •Efficacy and comparison with other agents
- •Summary and key points
- •SUMMARY
- •REFERENCES
- •KEY FEATURES
- •INTRODUCTION AND HISTORY
- •PHARMACOLOGY
- •DRUG MECHANISM
- •DRUG EFFECTS IN PRECLINICAL MODELS
- •SYSTEMIC AND OCULAR COMPLICATIONS AND TOXICITY
- •BIOACTIVITY IN HUMAN EYE DISEASES
- •NEOVASCULAR AMD PHASE I
- •NEOVASCULAR AMD PHASE III PROGRAM
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •KEY FEATURES
- •INTRODUCTION AND HISTORY
- •PHARMACOLOGY
- •PHARMACOKINETICS
- •DRUG MECHANISM
- •DRUG USE IN RETINAL DISEASES
- •DIABETIC RETINOPATHY
- •RETINAL VEIN OCCLUSION
- •OTHERS
- •CONTRAINDICATIONS
- •OCULAR COMPLICATIONS AND TOXICITY
- •DRUG INTERACTIONS
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •KEY FEATURES
- •INTRODUCTION TO PROTEIN KINASE C
- •PROTEIN KINASE C FAMILY
- •EFFECTS OF ACTIVATED PKC
- •PHARMACOLOGY OF RUBOXISTAURIN
- •EFFECT OF RUBOXISTAURIN IN HUMAN NONOCULAR DISEASES
- •Use of PKC Inhibitors in the treatment of diabetic macular edema and diabetic retinopathy
- •EFFICACY OF RUBOXISTAURIN IN THE TREATMENT OF DIABETIC RETINOPATHY
- •OCULAR AND SYSTEMIC COMPLICATIONS AND TOXICITY OF RUBOXISTAURIN
- •INTERACTION OF RUBOXISTAURIN WITH OTHER DRUGS
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •KEY FEATURES
- •INTRODUCTION AND HISTORY OF SIRNA FOR RETINAL DISEASES
- •PHARMACOLOGY, DRUG MECHANISM, AND DRUG EFFECTS IN NONOCULAR DISEASES
- •DRUG USES IN RETINAL DISEASES
- •BEVASIRANIB FOR SUBFOVEAL CHOROIDAL NEOVASCULARIZATION
- •BEVASIRANIB FOR NEOVASCULAR MACULAR DEGENERATION: RESULTS
- •BEVASIRANIB FOR THE TREATMENT OF DIABETIC MACULAR EDEMA (DME)
- •SIRNA-027 FOR SUBFOVEAL CHOROIDAL NEOVASCULARIZATION
- •REDD14 NP
- •SUMMARY AND KEY POINTS
- •ACKNOWLEDGMENT
- •REFERENCES
- •Ocular gene therapy
- •KEY FEATURES
- •INTRODUCTION TO GENE THERAPY
- •CURRENT VIRAL VECTORS
- •VIRAL VECTOR-ASSOCIATED RISKS
- •VIRAL VERSUS NONVIRAL VECTORS
- •STRATEGIES FOR RECESSIVE VERSUS DOMINANT DISEASE
- •STRATEGIES FOR PROLIFERATIVE AND NEOPLASTIC OCULAR DISEASE
- •RETINOBLASTOMA GENE THERAPY CLINICAL TRIAL
- •GENE THERAPY FOR LEBER’S CONGENITAL AMAUROSIS TRIAL
- •SUMMARY AND KEYPOINTS: THE FUTURE OF GENE THERAPY
- •REFERENCES
- •KEY FEATURES
- •INTRODUCTION
- •MECHANISM OF PROTECTION: APPROACHES AND CHALLENGES
- •ANTIOXIDATIVE THERAPY
- •EXCITOTOXICITY
- •NEUROTROPHIC FACTORS
- •ANTIAPOPTOPIC THERAPY
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •KEY FEATURES
- •INTRODUCTION AND HISTORY
- •PHARMACOLOGY
- •DRUG MECHANISM
- •PDT IN ONCOLOGICAL DISORDERS
- •PDT IN IMMUNE (NONONCOLOGICAL) DISORDERS
- •DRUG USE IN RETINAL DISEASES
- •AGE-RELATED MACULAR DEGENERATION
- •PATHOLOGIC MYOPIA
- •OTHER SUBFOVEAL AND JUXTAFOVEAL POSTINFLAMMATORY OR IDIOPATHIC CHOROIDAL NEOVASCULARIZATION
- •POLYPOIDAL CHOROIDAL VASCULOPATHY
- •CENTRAL SEROUS CHORIORETINOPATHY
- •INTRAOCULAR VASOPROLIFERATIVE TUMORS
- •RETINAL ASTROCYTOMA
- •CHOROIDAL OSTEOMA
- •CHOROIDAL MELANOMA
- •RETINOBLASTOMA
- •CONJUNCTIVAL IN SITU SQUAMOUS CELL CARCINOMA
- •EFFICACY AND COMPARISON WITH OTHER AGENTS
- •CONTRAINDICATIONS
- •OCULAR COMPLICATIONS AND TOXICITY
- •DRUG INTERACTIONS
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •KEY FEATURES
- •INTRODUCTION
- •RETINOBLASTOMA (Tables 44.1 and 44.2)
- •GENERAL CONSIDERATIONS
- •CHEMOREDUCTION
- •AGENTS
- •RESULTS
- •CHEMOREDUCTION FAILURE
- •SIDE-EFFECTS
- •CHEMOTHERMOTHERAPY
- •PERIOCULAR AND SUBCONJUNCTIVAL CHEMOTHERAPY
- •INTRAVITREAL CHEMOTHERAPY
- •INTRA-ARTERIAL CHEMOTHERAPY
- •ADJUVANT CHEMOTHERAPY
- •NO CHOROIDAL, SCLERAL, OR POSTLAMINAR OPTIC NERVE INVOLVEMENT
- •CHOROIDAL INVASION
- •POSTLAMINAR OPTIC NERVE INVASION
- •TUMOR AT CUT OPTIC NERVE MARGIN
- •METASTATIC RETINOBLASTOMA
- •UVEAL METASTASIS
- •GENERAL CONSIDERATIONS
- •CHEMOTHERAPY
- •PROGNOSIS
- •UVEAL MELANOMA
- •METASTATIC UVEAL MELANOMA
- •INTRAOCULAR LYMPHOMA
- •GENERAL CONSIDERATIONS
- •TREATMENT
- •SUMMARY AND KEYPOINTS
- •REFERENCES
- •Antibiotics
- •INTRODUCTION
- •POTENTIAL NEW TREATMENT REGIMENS
- •TOPICAL FLUOROQUINOLONES
- •ORAL AND INTRAVENOUS ANTIBIOTICS
- •NASALLY APPLIED ANTIBIOTICS
- •ORAL, TOPICAL, AND INTRAVITREAL ANTIFUNGAL AGENTS
- •CONCLUSION
- •REFERENCES
- •SECTION 5: Pharmacotherapy and Surgery
- •KEY FEATURES (PHARMACOLOGY)
- •INTRODUCTION AND HISTORY
- •RHEOPHERESIS IN RETINAL DISEASES
- •AGE-RELATED MACULAR DEGENERATION
- •MAC-1 trial
- •Multicenter investigation of rheopheresis for AMD (MIRA-1)
- •DIABETIC MACULOPATHY
- •CENTRAL RETINAL VEIN OCCLUSION
- •UVEAL EFFUSION SYNDROME
- •Complications
- •SUMMARY
- •REFERENCES
- •Enzymatic vitrectomy and pharmacologic vitreodynamics
- •INTRODUCTION AND HISTORY
- •PHARMACOLOGY AND BIOCHEMISTRY
- •INDICATIONS
- •SURGICAL ADJUNCT
- •NONSURGICAL INDICATIONS
- •OPERATIVE TECHNIQUES
- •OUTCOMES
- •SUMMARY
- •REFERENCES
- •KEY FEATURES, INTRODUCTION, AND HISTORY
- •RATIONALE
- •PHARMACOLOGY AND BIOCHEMISTRY
- •INDICATIONS, OUTCOMES, AND COMPLICATIONS – VITAL DYES IN CHROMOVITRECTOMY
- •INDOCYANINE GREEN
- •INFRACYANINE GREEN
- •TRYPAN BLUE
- •PATENT BLUE
- •BRILLIANT BLUE
- •SODIUM FLUORESCEIN (SF)
- •TRIAMCINOLONE ACETONIDE
- •DYE INJECTION
- •MACULAR HOLE PROTECTION
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •KEY FEATURES
- •INTRODUCTION AND HISTORY
- •BIOLOGICAL EFFECTS
- •INDICATIONS
- •CHOROIDAL MELANOMA
- •OTHER OCULAR TUMORS
- •OPERATIVE TECHNIQUES
- •PLAQUE PLACEMENT TECHNIQUE
- •EPIMACULAR BRACHYTHERAPY FOR AGE-RELATED MACULAR DEGENERATION
- •SURGICAL TECHNIQUE
- •OUTCOMES
- •CHOROIDAL MELANOMA
- •BRACHYTHERAPY FOR AGE-RELATED MACULAR DEGENERATION
- •COMPLICATIONS
- •RADIATION RETINOPATHY
- •OPTIC NEUROPATHY
- •LENS TOXICITY
- •SCLERA/CHOROID TOXICITY
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •INTRODUCTION
- •RPE DISEASE AND INDICATIONS FOR TREATMENT BY TRANSPLANTATION
- •BRUCH’S MEMBRANE AS A SUBSTRATE FOR TRANSPLANTED RPE
- •HISTORICAL DEVELOPMENT OF RPE TREATMENT
- •AUTOLOGOUS TREATMENT
- •IRIS PIGMENT EPITHELIUM
- •RETINAL PIGMENT EPITHELIUM
- •Suspension
- •RPE-BM Choroid Sheet
- •TISSUE ENGINEERING AND RPE REPLACEMENT STRATEGIES
- •PROSTHESIS OR TISSUE ENGINEERING OF BRUCH’S MEMBRANE
- •STEM CELLS
- •Embryonic stem cells
- •Bone marrow-derived cells
- •MANAGING DECONSTRUCTIVE REACTIONS INDUCED BY RETINAL DETACHMENT
- •CONCLUSIONS AND FUTURE DIRECTIONS
- •ACKNOWLEDGMENTS
- •REFERENCES
- •SECTION 6: The Last Words
- •Off-label drugs and the impact of the Food and Drug Administration in the treatment of retinal disease
- •INTRODUCTION
- •OFF-LABEL DRUG USAGE AND THE FOOD AND DRUG ADMINISTRATION
- •HISTORICAL PERSPECTIVES
- •FDA APPROVAL PROCESS
- •THE CONCEPT OF “OFF-LABEL”
- •“INVESTIGATIONAL USAGE OF DRUGS”
- •COMPOUNDING PHARMACIES
- •RISK MANAGEMENT ISSUES
- •INFORMED CONSENT
- •MEDICAL PAYMENT/COVERAGE
- •NATIONAL COVERAGE DETERMINATION
- •CLINICAL TRIALS
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •INTRODUCTION
- •HISTORY
- •KEY CONCEPTS
- •EVIDENCE-BASED MEDICINE
- •TYPES OF PHARMACOECONOMIC ANALYSIS
- •COST MINIMIZATION ANALYSIS
- •COST–BENEFIT ANALYSIS
- •COST-EFFECTIVENESS ANALYSIS
- •Cost-effectiveness analysis
- •COST–UTILITY ANALYSIS
- •Quality of life: Function-based instruments
- •Quality of life: Preference-based instruments
- •Utility gain
- •Value gain
- •Value trumps cost
- •Cost–utility ratio
- •Cost-effectiveness standards
- •Discounting5
- •Value-based medicine
- •Standardization
- •Patient respondents
- •COST PERSPECTIVE
- •SUMMARY AND KEY POINTS
- •REFERENCES
- •Future perspectives:
- •INTRODUCTION
- •KEY FEATURES
- •ANGIOGENESIS AND NEOVASCULAR AGE-RELATED MACULAR DEGENERATION
- •TYROSINE KINASE INHIBITORS
- •PDGF INHIBITORS
- •INTEGRIN INHIBITORS
- •SMALL INTERFERING RNA
- •BIOACTIVE LIPIDS
- •NONNEOVASCULAR AGE-RELATED MACULAR DEGENERATION
- •COMPLEMENT INHIBITORS
- •DIABETIC MACULAR EDEMA
- •INHIBITION OF INFLAMMATION
- •SUMMARY AND KEY POINTS
- •ACKNOWLEDGMENT
- •REFERENCES
- •Index
Advanced stage is characterized by some or all of the following: acute |
Carotid artery occlusive disease |
severe pain, headache, nausea, and/or vomiting, photophobia, reduced |
In neurologically symptomatic patients with carotid disease, endarter- |
visual acuity (counting fingers to hand motion), elevated IOP |
|
(60 mmHg), conjunctival injection, corneal edema, synechial angle |
ectomy is recommended, and resolution of NVI and NVG has been |
closure, severe rubeosis, distorted, fixed, mid dilated pupil and ectro- |
reported after this procedure.29 For asymptomatic patients, endarterec- |
pion uveae, retinal neovascularization, and/or hemorrhage. |
tomy is not recommended,30 even if NVI or NVG is present. |
TREATMENT OPTIONS
The management of NVG is highly unpredictable, difficult, and controversial. There are two key aspects to the management of NVG: treatment of the underlying disease process responsible for rubeosis and treatment of the increased IOP. Treatment of rubeosis is directed at the ischemic retina in most cases. PRP is considered the treatment of choice (Figure 27.5). However, other modalities such as panretinal cryotherapy, transscleral diode laser retinopexy, and panretinal diathermy have been described. Goniophotocoagulation has been used to directly treat the new vessels in the angle in an effort to prevent synechial closure.
TREATMENT OF THE UNDERLYING DISEASE ASSOCIATED WITH NVG
Central retinal vein occlusion
NVG is the most dreaded and blinding complication of ischemic CRVO. If CRVO is of the ischemic type, PRP should be performed as soon as possible. Patients with nonischemic CRVO should be followed up carefully because 16% can become ischemic within 4 months. Without PRP, approximately 40% of CRVO of the ischemic type proceed to NVG.6
Central retinal artery occlusion
Since NVG has been reported to occur anywhere from 1 week to 5 months after CRAO, patients with CRAO should be followed up carefully for at least 6 months and PRP instituted when NVI is first noted.
PHARMACOLOGIC THERapIES
Medical treatment to control high IOP
Pilocarpine and other anticholinergic agents are generally contraindicated, because they may increase inflammation, cause miosis, worsen synechial angle closure, and decrease uveoscleral outflow. Medications that decrease aqueous humor production, such as topical b-blockers and topical and systemic carbonic anhydrase inhibitors, are beneficial but do not usually lower the IOP to a normal range in eyes with a closed angle. Topical apraclonidine, an α-adrenergic agonist, may be used short-term (days to weeks). Prostaglandins may not be of much help because they work by increasing the uveal outflow, which may be covered by a membrane. Hyperosmotic agents can be used intermittently.
The most important medications remain topical atropine and topical corticosteroids to decrease congestion and inflammation, and often provide adequate symptomatic relief despite pressures as high as 60 mmHg.
Diabetic retinopathy
For NVG to develop in diabetes mellitus there must be retinal hypoxia associated with proliferative retinopathy. The major factor in the onset of proliferative retinopathy is the duration of diabetes. Once PDR is present, there is strong evidence that PRP is the treatment of choice for prevention of development of NVG and has shown the beneficial effects in causing regression of NVI.
Figure 27.5 Panphotocoagulation in an eye with neovascularization of the disc (NVD). Notice the chorioretinal scars outside the arcades.
Anti-VEGF therapy
There is evidence now that VEGF is an important factor in the pathogenesis of ocular neovascularization and NVG.31 Several case studies have attempted to ascertain the value of intraocular anti-VEGF therapy with bevacizumab as an adjunctive treatment for NVI associated with glaucoma. A single application of the drug caused a dramatic reduction of leakage from rubeotic vessels. Oshima et al.32 reported a case series of seven eyes with NVI secondary to PDR. The NVI regressed in all patients at 1 week, and repeated injections stabilized the recurrence (in two eyes) that was seen 2 months after the initial injection (Figure 27.6). In another report, Krzystolik et al.33 reported one patient with complicated neovascular DR, who received an intravitreal injection of 0.3 mg pegaptanib sodium in his right eye. Within 9 days, the iris vessels resolved. Despite an initial favorable response, the patient developed postoperative vitreous hemorrhage and recurrent rubeosis on postoperative day 7. The patient received repeated injections and has stabilized the recurrence seen 4 months after the initial injection.
Corticosteroid therapy
One of the most important still unsolved problems in clinical ophthalmology is the proliferation of vascular cells in eyes with intraocular neovascular disease. The new vessels on the iris surface and anteriorchamber angle are secondary to ischemic and, to a lesser degree, to inflammatory retinal diseases. For many years, corticosteroids have been known to reduce intraocular inflammation and, depending on the concentration, to suppress cell proliferation. Jonas et al.34 proposed the intravitreal injection of crystalline cortisone as an adjunctive therapy to manage NVG. They reported using a single injection of approximately 20 mg triamcinolone acetonide with little vehicle in patients with established NVG. After a follow-up period of 3.10 ± 2.4 months, they showed a significant decrease of the degree of rubeosis iridis, improvement in IOP, and no significant changes in visual acuity.
Pharmacotherapy to Amenable Diseases Retinal • 3 section
189
• 27 chapterGlaucoma Neovascular
A B
Figure 27.6 A patient with iris melanoma in his only seeing eye: the melanoma grew quite large and neovascular glaucoma developed. The patient was then treated with plaque radiotherapy. A single application of intraocular antivascular endothelial growth factor therapy with bevacizumab caused a dramatic reduction of leakage from rubeotic vessels. (A) Color photograph before bevacizumab. (B) Color photograph after bevacizumab. (Courtesy of Carol L. Shields, MD.)
Photodynamic therapy
In 1984, in an experimental study in rhesus monkeys with iris neovascularization, Packer et al.35 reported marked reduction of leakage from NVI on fluorescein angiography after photodynamic therapy, but the effect was temporary and required repeated application to control NVI. Parodi and Iacono36 reported that photodynamic therapy might be a promising approach for NVG. In their series of 16 NVG eyes, there was a 39% decrease in IOP overall and treatment did not control IOP satisfactorily in 31%.
Although PRP is considered the standard treatment of retinal ischemia, the best alternative method is still undetermined. Currently, there is considerable interest in the anti-VEGF drugs for the management of ocular neovascularization in age-related macular degeneration, but, so far, we have little long-term worthwhile information in a large series of patients about its effectiveness in prevention or control of NVG or ocular neovascularization elsewhere. The explanation of the signal transduction pathway in ocular angiogenesis may lead to the development of new antivasoproliferative pharmacologic agents. The ideal modalities for early detection of angle neovascularization remain to be defined.
TREATMENT OUTCOMES
AND PROGNOSIS
Despite the many advances in the treatment of NVG, visual prognosis remains poor. The key to improving patient outcomes is early detection of angle neovascularization and initiation of treatment of the underlying disease responsible for the rubeosis. Once IOP becomes elevated, successful management of the disease may be extremely difficult.
In the management strategy, the first priority should be to try to prevent its development by appropriate management of the causative diseases. Currently, there is no satisfactory means of treating NVG and preventing visual loss in the majority, in spite of multiple modes of medical and surgical options advocated over the years and claims made.
Adjuvant bevacizumab for NVG may offer a more causal treatment of the neovascular trigger, might be able to prevent further PAS formation and secondary angle damage, and is likely to open a therapeutic window for PRP. The intravitreal application of triamcinolone acetonide helps to reduce the NVI temporarily. With the normalization of IOP and clearing of the corneal edema, laser application to the retina is possible through clear media.
SUMMARY AND KEY POINTS
In the management strategy, the first priority should be to try to prevent its development by appropriate management of the causative diseases. The most common diseases responsible for development of NVG are ischemic CRVO, DR, and ocular ischemic syndrome.
REFERENCES
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