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1 General aspects (0)   1.1 Epidemiology (10)   1.2 Population genetics (7)   1.3 Pathogenesis (3)   1.4 Quality of life (3)   1.5 Glaucomas as cause of blindness (2)   1.6 Prevention and screening (5) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (0)   2.2 Cornea (1)   2.3 Sclera (0)   2.4 Anterior chamber angle (0)   2.5 Meshwork (3)     2.5.1 Trabecular meshwork (10)     2.5.2 Schlemms canal (0)     2.5.3 Scleral outlet channels (0)   2.6 Aqueous humor dynamics (0)     2.6.1 Production (0)     2.6.2 Outflow (1)       2.6.2.1 Trabecular meshwork (1)       2.6.2.2 Uveoscleral (0)     2.6.3 Compostion (3)   2.7 Episcleral veins and venous pressure (1)   2.8 Iris (4)   2.9 Ciliary body (3)   2.10 Lens (0)   2.11 Vitreous body (0)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (2)   2.13 Retina and retinal nerve fibre layer (20)   2.14 Optic disc (18)   2.15 Optic nerve (2)   2.16 Chiasma and retrochiasmal central nervous system (1)   2.17 Stem cells (0)   2.20 Other (0) 3 Laboratory methods (2)   3.1 Microscopy (3)   3.2 Electron microscopy (2)   3.3 Immunohistochemistry (8)   3.4 Molecular genetics (2)     3.4.1 Linkage studies (8)     3.4.2 Gene studies (3)   3.5 Molecular biology incl. SiRNA (9)   3.6 Cellular biology (6)   3.7 Biochemistry (3)   3.8 Pharmacology (5)   3.9 Pathophysiology (2)   3.10 Immunobiology (0)   3.11 Pharmacogenetics (0)   3.12 Proteomics (0)   3.13 In vivo imaging (0)     3.13.1 Laser Scanning (0)       3.13.1.1 Confocal Scanning Laser Ophthalmoscopy (0)       3.13.1.2 Confocal Scanning Laser Polarimetry (0)     3.13.2 Optical Coherence Tomography (0)       3.13.2.1 Anterior Segment (0)       3.13.2.2 Posterior Segment (0)     3.13.3 RGC Imaging (0)     3.13.4 Other (0)   3.20 Other (0) 4 Tissue culture of ocular cells (0) 5 Experimental glaucoma; animal models (20)   5.1 Rodent (0)   5.2 Primates (0)   5.3 Other (0) 6 Clinical examination methods (0)   6.1 Intraocular pressure measurement; factors affecting IOP (11)     6.1.1 Devices, techniques (0)     6.1.2 Fluctuation, circadian rhythms (0)     6.1.3 Factors affecting IOP (0)   6.2 Tonography, aqueous flow measurement (see also 2.6) (1)   6.3 Biomicroscopy (slitlamp) (0)     6.3.1 Anterior segment (0)     6.3.2 Posterior segment (0)   6.4 Gonioscopy (0)   6.5 Ophthalmoscopy (0)   6.6 Visual field examination and other visual function tests (2)     6.6.1 Conventional manual (1)     6.6.2 Automated (9)     6.6.3 Special methods (e.g. color, contrast, SWAP etc.) (11)   6.7 Electro-ophthalmodiagnosis (8)   6.8 Photography (0)     6.8.1 Anterior segment (1)     6.8.2 Posterior segment (5)   6.9 Computerized image analysis (0)     6.9.1 Laser scanning (17)       6.9.1.1 Confocal Scanning Laser Ophthalmoscopy (0)       6.9.1.2 Confocal Scanning Laser Polarimetry (0)     6.9.2 Optical coherence tomography (8)       6.9.2.1 Anterior (0)       6.9.2.2 Posterior (0)     6.9.5 Other (1)   6.10 Fluorescein (ICG) angiography (0)     6.10.1 Anterior segment (0)     6.10.2 Posterior segment (0)   6.11 Bloodflow measurements (12)   6.12 Ultrasonography and ultrasound biomicroscopy (2)   6.13 Provocative tests (0)   6.19 Telemedicine (0)   6.20 Progression (2)   6.30 Other (0) 8 Refractive errors in relation to glaucoma (0)   8.1 Myopia (0)   8.2 Hypermetropia (0)   8.3 Contact lenses (1)   8.4 Refractive surgical procedures (0)   8.5 Other (0) 9 Clinical forms of glaucomas (0)   9.1 Developmental glaucomas (3)     9.1.1 Congenital glaucoma, Buphthalmos (0)     9.1.2 Juvenile glaucoma (0)     9.1.3 Syndromes of Axenfeld, Rieger, Peters, aniridia (4)     9.1.4 Other (0)   9.2 Primary open angle glaucomas (0)     9.2.1 Ocular hypertension (0)     9.2.2 Other risk factors for glaucoma (8)     9.2.3 Open angle glaucoma with elevated IOP (1)     9.2.4 Normal pressure glaucoma (6)   9.3 Primary angle closure glaucomas (1)     9.3.1 Acute primary angle closure glaucoma (pupillary block) (2)     9.3.2 Chronic primary angle closure glaucoma (pupillary block) (2)     9.3.3 Plateau iris syndrome (1)     9.3.4 Primary angle closure suspect (0)     9.3.5 Primary angle closure (0)     9.3.10 Other (1)   9.4 Glaucomas associated with other ocular and systemic disorders (0)     9.4.1 Steroid-induced glaucoma (0)     9.4.2 Glaucomas associated with disorders of the cornea, conjunctiva, sclera (0)       9.4.2.1 Iridocorneal endothelial syndrome (ICE, incl. irisatrophy) (0)       9.4.2.2 Posterior polymorphous dystrophy (0)       9.4.2.3 Fuchs' endothelial dystrophy (0)       9.4.2.5 Other (0)     9.4.3 Glaucomas associated with disorders of the iris and ciliary body (1)       9.4.3.1 Pigmentary glaucoma (6)       9.4.3.5 Other (0)     9.4.4 Glaucomas associated with disorders of the lens (0)       9.4.4.1 Exfoliation syndrome (2)       9.4.4.2 Glaucomas associated with cataracts (1)       9.4.4.3 Glaucomas associated with lens dislocation (0)       9.4.4.5 Other (0)     9.4.5 Glaucomas associated with disorders of the retina, choroid and vitreous (0)       9.4.5.1 Neovascular glaucoma (2)       9.4.5.5 Other (0)     9.4.6 Glaucomas associated with inflammation, uveitis (0)     9.4.7 Glaucomas associated with ocular trauma (0)     9.4.8 Glaucomas associated with intraocular tumors (0)     9.4.9 Glaucomas associated with elevated episcleral venous pressure (1)       9.4.10 Glaucomas associated with hemorrhage (0)     9.4.11 Glaucomas following intraocular surgery (0)       9.4.11.1 Ciliary block (malignant) glaucoma (0)       9.4.11.2 Glaucomas in aphakia and pseudophakia (1)       9.4.11.3 Epithelial, fibrous, and endothelial proliferation (0)       9.4.11.4 Glaucomas associated with corneal surgery (3)       9.4.11.5 Glaucomas associated with vitreoretinal surgery (0)     9.4.15 Glaucoma in relation to systemic disease (4)     9.4.20 Other (0) 10 Differential diagnosis e.g. anterior and posterior ischemic optic neuropathy (4) 11 Medical treatment (0)   11.1 General management, indication (8)   11.2 Cholinergic drugs (4)   11.3 Adrenergic drugs (0)     11.3.1 Epinephrine (0)     11.3.2 Thymoxamine, dapiprazole (0)     11.3.3 Apraclonidine, brimonidine (4)     11.3.4 Betablocker (12)     11.3.5 Other (1)   11.4 Prostaglandins (31)   11.5 Carbonic anhydrase inhibitors (0)     11.5.1 Systemic (0)     11.5.2 Topical (7)   11.6 Osmotic treatment (1)   11.7 Treatment of bloodflow (1)   11.8 Neuroprotection (7)   11.9 Gene therapy (2)   11.13 Combination therapy (0)     11.13.1 Betablocker and pilocarpine (0)     11.13.2 Betablocker and carbon anhydrase inhibitor (0)     11.13.3 Betablocker and brimonidine (0)     11.13.4 Betablocker and prostaglandin (0)     11.13.5 Other (0)   11.14 Investigational drugs; pharmacological experiments (7)   11.15 Other drugs in relation to glaucoma (0)   11.16 Vehicles, delivery systems, pharmacokinetics, formulation (1)   11.17 Cooperation with medical therapy e.g. persistency, compliance, adherence (0)   11.20 Other (0) 12 Surgical treatment (0)   12.1 General management, indication (5)   12.2 Laser iridotomy (0)   12.3 Laser iridoplasty (0)   12.4 Laser trabeculoplasty and other laser treatment of the angle (1)   12.7 Surgical iridectomy (0)   12.8 Filtering surgery (1)     12.8.1 Without tube implant (4)     12.8.2 With tube implant or other drainage devices (11)     12.8.3 Non-perforating (13)     12.8.4 Using laser (0)     12.8.5 Other (0)     12.8.10 Woundhealing antifibrosis (10)     12.8.11 Complications, endophthalmitis (6)   12.9 Trabeculotomy, goniotomy (1)   12.10 Cyclodestruction (3)   12.11 Cyclodialysis (0)   12.12 Cataract extraction (0)     12.12.1 Intracapsular (0)     12.12.2 Extracapsular (1)     12.12.3 Phacoemulsification (2)   12.14 Combined cataract extraction and glaucoma surgery (0)     12.14.1 Intracapsular (0)     12.14.2 Extracapsular (0)     12.14.3 Phacoemulsification (6)   12.15 Capsulotomy (0)   12.16 Vitrectomy (0)   12.17 Anesthesia (0)   12.20 Other (2) 13 Therapeutic prognosis and outcome (0)   13.1 Prognostic factors (0)   13.2 Outcome (0)     13.2.1 IOP (0)     13.2.2 Visual field (0)       13.2.2.1 Progression (0)       13.2.2.2 Improvement (0)     13.2.3 Other (0) 14 Costing studies; pharmacoeconomics (5) 15 Miscellaneous (2)

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Abstract #9167 Published in IGR 5-2

Effect of contact lens wear on central corneal thickness measurements

Braun DA; Anderson Penno EE
Journal of Cataract and Refractive Surgery 2003; 29: 1319-1322

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PURPOSE: To compare central corneal thickness measurements as a function of contact lens wear in patients presenting for refractive surgery. METHODS: A retrospective study of charts yielded 634 eyes meeting the inclusion criteria. Pachymetry measurements of spectacle-wearing control eyes were compared to those of full-time soft contact lens wearers and rigid gas-permeable contact lens wearers. All measurements were taken with the DGH ultrasonic pachymeter by a single observed. RESULTS: Soft contact lens wears had a mean reduction in corneal thickness measurements of 22 μm compared to the control population ( p = 0.00001). Rigid gas-permeable lens wearers had a reduction of 24 μm compared to the control population (p = 0.00001). CONCLUSION: There was a clinically significant reduction in corneal thickness measurements associated with full-time contact lens wear.

Dr. E.E. Anderson Penno, Gimbel Eye Centre, 450, 4935-40 Avenue NW, Calgary, Alberta T3A 1N1, Canada. eepenno@gimbel.com

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Classification:

6.1 Intraocular pressure measurement; factors affecting IOP (Part of: 6 Clinical examination methods)
8.3 Contact lenses (Part of: 8 Refractive errors in relation to glaucoma)

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