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1 General aspects (0)   1.1 Epidemiology (14)   1.2 Population genetics (1)   1.3 Pathogenesis (4)   1.4 Quality of life (9)   1.5 Glaucomas as cause of blindness (15)   1.6 Prevention and screening (10) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (11)   2.2 Cornea (32)   2.3 Sclera (12)   2.4 Anterior chamber angle (6)   2.5 Meshwork (0)     2.5.1 Trabecular meshwork (17)     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 (0)       2.6.2.1 Trabecular meshwork (5)       2.6.2.2 Uveoscleral (0)     2.6.3 Compostion (4)   2.7 Episcleral veins and venous pressure (0)   2.8 Iris (8)   2.9 Ciliary body (0)   2.10 Lens (0)   2.11 Vitreous body (0)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (7)   2.13 Retina and retinal nerve fibre layer (44)   2.14 Optic disc (40)   2.15 Optic nerve (9)   2.16 Chiasma and retrochiasmal central nervous system (6)   2.17 Stem cells (4)   2.20 Other (0) 3 Laboratory methods (0)   3.1 Microscopy (2)   3.2 Electron microscopy (4)   3.3 Immunohistochemistry (1)   3.4 Molecular genetics (0)     3.4.1 Linkage studies (2)     3.4.2 Gene studies (54)   3.5 Molecular biology incl. SiRNA (28)   3.6 Cellular biology (35)   3.7 Biochemistry (7)   3.8 Pharmacology (9)   3.9 Pathophysiology (5)   3.10 Immunobiology (9)   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 (1)       3.13.2.2 Posterior Segment (0)     3.13.3 RGC Imaging (2)     3.13.4 Other (1)   3.20 Other (0) 4 Tissue culture of ocular cells (0) 5 Experimental glaucoma; animal models (0)   5.1 Rodent (44)   5.2 Primates (2)   5.3 Other (12) 6 Clinical examination methods (0)   6.1 Intraocular pressure measurement; factors affecting IOP (0)     6.1.1 Devices, techniques (11)     6.1.2 Fluctuation, circadian rhythms (7)     6.1.3 Factors affecting IOP (18)   6.2 Tonography, aqueous flow measurement (see also 2.6) (0)   6.3 Biomicroscopy (slitlamp) (0)     6.3.1 Anterior segment (2)     6.3.2 Posterior segment (0)   6.4 Gonioscopy (2)   6.5 Ophthalmoscopy (0)   6.6 Visual field examination and other visual function tests (0)     6.6.1 Conventional manual (0)     6.6.2 Automated (45)     6.6.3 Special methods (e.g. color, contrast, SWAP etc.) (13)   6.7 Electro-ophthalmodiagnosis (4)   6.8 Photography (0)     6.8.1 Anterior segment (4)     6.8.2 Posterior segment (9)   6.9 Computerized image analysis (0)     6.9.1 Laser scanning (0)       6.9.1.1 Confocal Scanning Laser Ophthalmoscopy (14)       6.9.1.2 Confocal Scanning Laser Polarimetry (1)     6.9.2 Optical coherence tomography (0)       6.9.2.1 Anterior (8)       6.9.2.2 Posterior (61)     6.9.5 Other (3)   6.10 Fluorescein (ICG) angiography (0)     6.10.1 Anterior segment (0)     6.10.2 Posterior segment (1)   6.11 Bloodflow measurements (29)   6.12 Ultrasonography and ultrasound biomicroscopy (5)   6.13 Provocative tests (3)   6.19 Telemedicine (2)   6.20 Progression (13)   6.30 Other (3) 8 Refractive errors in relation to glaucoma (0)   8.1 Myopia (11)   8.2 Hypermetropia (0)   8.3 Contact lenses (1)   8.4 Refractive surgical procedures (0)   8.5 Other (1) 9 Clinical forms of glaucomas (0)   9.1 Developmental glaucomas (0)     9.1.1 Congenital glaucoma, Buphthalmos (17)     9.1.2 Juvenile glaucoma (14)     9.1.3 Syndromes of Axenfeld, Rieger, Peters, aniridia (7)     9.1.4 Other (0)   9.2 Primary open angle glaucomas (0)     9.2.1 Ocular hypertension (3)     9.2.2 Other risk factors for glaucoma (9)     9.2.3 Open angle glaucoma with elevated IOP (2)     9.2.4 Normal pressure glaucoma (25)   9.3 Primary angle closure glaucomas (0)     9.3.1 Acute primary angle closure glaucoma (pupillary block) (12)     9.3.2 Chronic primary angle closure glaucoma (pupillary block) (0)     9.3.3 Plateau iris syndrome (1)     9.3.4 Primary angle closure suspect (0)     9.3.5 Primary angle closure (14)     9.3.10 Other (0)   9.4 Glaucomas associated with other ocular and systemic disorders (0)     9.4.1 Steroid-induced glaucoma (11)     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 (4)     9.4.3 Glaucomas associated with disorders of the iris and ciliary body (0)       9.4.3.1 Pigmentary glaucoma (2)       9.4.3.5 Other (1)     9.4.4 Glaucomas associated with disorders of the lens (0)       9.4.4.1 Exfoliation syndrome (17)       9.4.4.2 Glaucomas associated with cataracts (4)       9.4.4.3 Glaucomas associated with lens dislocation (2)       9.4.4.5 Other (1)     9.4.5 Glaucomas associated with disorders of the retina, choroid and vitreous (0)       9.4.5.1 Neovascular glaucoma (11)       9.4.5.5 Other (8)     9.4.6 Glaucomas associated with inflammation, uveitis (6)     9.4.7 Glaucomas associated with ocular trauma (2)     9.4.8 Glaucomas associated with intraocular tumors (2)     9.4.9 Glaucomas associated with elevated episcleral venous pressure (0)       9.4.10 Glaucomas associated with hemorrhage (4)     9.4.11 Glaucomas following intraocular surgery (1)       9.4.11.1 Ciliary block (malignant) glaucoma (5)       9.4.11.2 Glaucomas in aphakia and pseudophakia (9)       9.4.11.3 Epithelial, fibrous, and endothelial proliferation (0)       9.4.11.4 Glaucomas associated with corneal surgery (10)       9.4.11.5 Glaucomas associated with vitreoretinal surgery (5)     9.4.15 Glaucoma in relation to systemic disease (40)     9.4.20 Other (2) 10 Differential diagnosis e.g. anterior and posterior ischemic optic neuropathy (2) 11 Medical treatment (0)   11.1 General management, indication (6)   11.2 Cholinergic drugs (0)   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 (2)     11.3.5 Other (0)   11.4 Prostaglandins (28)   11.5 Carbonic anhydrase inhibitors (1)     11.5.1 Systemic (1)     11.5.2 Topical (3)   11.6 Osmotic treatment (0)   11.7 Treatment of bloodflow (0)   11.8 Neuroprotection (51)   11.9 Gene therapy (3)   11.13 Combination therapy (0)     11.13.1 Betablocker and pilocarpine (0)     11.13.2 Betablocker and carbon anhydrase inhibitor (3)     11.13.3 Betablocker and brimonidine (2)     11.13.4 Betablocker and prostaglandin (5)     11.13.5 Other (1)   11.14 Investigational drugs; pharmacological experiments (24)   11.15 Other drugs in relation to glaucoma (22)   11.16 Vehicles, delivery systems, pharmacokinetics, formulation (24)   11.17 Cooperation with medical therapy e.g. persistency, compliance, adherence (12)   11.20 Other (3) 12 Surgical treatment (0)   12.1 General management, indication (0)   12.2 Laser iridotomy (1)   12.3 Laser iridoplasty (0)   12.4 Laser trabeculoplasty and other laser treatment of the angle (13)   12.7 Surgical iridectomy (0)   12.8 Filtering surgery (0)     12.8.1 Without tube implant (26)     12.8.2 With tube implant or other drainage devices (42)     12.8.3 Non-perforating (10)     12.8.4 Using laser (0)     12.8.5 Other (0)     12.8.10 Woundhealing antifibrosis (16)     12.8.11 Complications, endophthalmitis (11)   12.9 Trabeculotomy, goniotomy (15)   12.10 Cyclodestruction (6)   12.11 Cyclodialysis (0)   12.12 Cataract extraction (0)     12.12.1 Intracapsular (0)     12.12.2 Extracapsular (0)     12.12.3 Phacoemulsification (13)   12.14 Combined cataract extraction and glaucoma surgery (0)     12.14.1 Intracapsular (0)     12.14.2 Extracapsular (0)     12.14.3 Phacoemulsification (11)   12.15 Capsulotomy (0)   12.16 Vitrectomy (0)   12.17 Anesthesia (2)   12.20 Other (1) 13 Therapeutic prognosis and outcome (0)   13.1 Prognostic factors (2)   13.2 Outcome (0)     13.2.1 IOP (1)     13.2.2 Visual field (0)       13.2.2.1 Progression (0)       13.2.2.2 Improvement (1)     13.2.3 Other (0) 14 Costing studies; pharmacoeconomics (8) 15 Miscellaneous (24)

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Abstract #60111 Published in IGR 16-4

The first rapid assessment of avoidable blindness (RAAB) in Thailand

Isipradit S; Sirimaharaj M; Charukamnoetkanok P; Thonginnetra O; Wongsawad W; Sathornsumetee B; Somboonthanakij S; Soomsawasdi P; Jitawatanarat U; Taweebanjongsin W; Arayangkoon E; Arame P; Kobkoonthon C; Pangputhipong P
PLoS ONE 2014; 9: e114245

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BACKGROUND: The majority of vision loss is preventable or treatable. Population surveys are crucial for planning, implementation, and monitoring policies and interventions to eliminate avoidable blindness and visual impairments. This is the first rapid assessment of avoidable blindness (RAAB) study in Thailand. METHODS: A cross-sectional study of a population in Thailand age 50 years old or over aimed to assess the prevalence and causes of blindness and visual impairments. Using the Thailand National Census 2010 as the sampling frame, a stratified four-stage cluster sampling based on a probability proportional to size was conducted in 176 enumeration areas from 11 provinces. Participants received comprehensive eye examination by ophthalmologists. RESULTS: The age and sex adjusted prevalence of blindness (presenting visual acuity (VA) <20/400), severe visual impairment (VA <20/200 but ≥20/400), and moderate visual impairment (VA <20/70 but ≥20/200) were 0.6% (95% CI: 0.5-0.8), 1.3% (95% CI: 1.0-1.6), 12.6% (95% CI: 10.8-14.5). There was no significant difference among the four regions of Thailand. Cataract was the main cause of vision loss accounted for 69.7% of blindness. Cataract surgical coverage in persons was 95.1% for cut off VA of 20/400. Refractive errors, diabetic retinopathy, glaucoma, and corneal opacities were responsible for 6.0%, 5.1%, 4.0%, and 2.0% of blindness respectively. CONCLUSION: Thailand is on track to achieve the goal of VISION 2020. However, there is still much room for improvement. Policy refinements and innovative interventions are recommended to alleviate blindness and visual impairments especially regarding the backlog of blinding cataract, management of non-communicative, chronic, age-related eye diseases such as glaucoma, age-related macular degeneration, and diabetic retinopathy, prevention of childhood blindness, and establishment of a robust eye health information system.

Mettapracharak (Wat Rai Khing) Hospital, 52 Moo 2 Rai Khing, Sampran, Nakornprathom 73210, Thailand.

Full article

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Classification:

1.5 Glaucomas as cause of blindness (Part of: 1 General aspects)
1.1 Epidemiology (Part of: 1 General aspects)

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