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1 General aspects (0)   1.1 Epidemiology (19)   1.2 Population genetics (0)   1.3 Pathogenesis (5)   1.4 Quality of life (12)   1.5 Glaucomas as cause of blindness (13)   1.6 Prevention and screening (10) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (4)   2.2 Cornea (20)   2.3 Sclera (10)   2.4 Anterior chamber angle (8)   2.5 Meshwork (0)     2.5.1 Trabecular meshwork (9)     2.5.2 Schlemms canal (1)     2.5.3 Scleral outlet channels (0)   2.6 Aqueous humor dynamics (0)     2.6.1 Production (1)     2.6.2 Outflow (0)       2.6.2.1 Trabecular meshwork (5)       2.6.2.2 Uveoscleral (1)     2.6.3 Compostion (1)   2.7 Episcleral veins and venous pressure (1)   2.8 Iris (2)   2.9 Ciliary body (1)   2.10 Lens (0)   2.11 Vitreous body (0)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (3)   2.13 Retina and retinal nerve fibre layer (25)   2.14 Optic disc (22)   2.15 Optic nerve (2)   2.16 Chiasma and retrochiasmal central nervous system (2)   2.17 Stem cells (3)   2.20 Other (0) 3 Laboratory methods (0)   3.1 Microscopy (3)   3.2 Electron microscopy (1)   3.3 Immunohistochemistry (2)   3.4 Molecular genetics (0)     3.4.1 Linkage studies (1)     3.4.2 Gene studies (28)   3.5 Molecular biology incl. SiRNA (9)   3.6 Cellular biology (35)   3.7 Biochemistry (5)   3.8 Pharmacology (8)   3.9 Pathophysiology (9)   3.10 Immunobiology (2)   3.11 Pharmacogenetics (0)   3.12 Proteomics (1)   3.13 In vivo imaging (0)     3.13.1 Laser Scanning (0)       3.13.1.1 Confocal Scanning Laser Ophthalmoscopy (1)       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 (2)     3.13.3 RGC Imaging (1)     3.13.4 Other (0)   3.20 Other (0) 4 Tissue culture of ocular cells (0) 5 Experimental glaucoma; animal models (0)   5.1 Rodent (26)   5.2 Primates (6)   5.3 Other (14) 6 Clinical examination methods (0)   6.1 Intraocular pressure measurement; factors affecting IOP (0)     6.1.1 Devices, techniques (18)     6.1.2 Fluctuation, circadian rhythms (6)     6.1.3 Factors affecting IOP (8)   6.2 Tonography, aqueous flow measurement (see also 2.6) (0)   6.3 Biomicroscopy (slitlamp) (1)     6.3.1 Anterior segment (0)     6.3.2 Posterior segment (0)   6.4 Gonioscopy (0)   6.5 Ophthalmoscopy (3)   6.6 Visual field examination and other visual function tests (0)     6.6.1 Conventional manual (0)     6.6.2 Automated (23)     6.6.3 Special methods (e.g. color, contrast, SWAP etc.) (7)   6.7 Electro-ophthalmodiagnosis (7)   6.8 Photography (0)     6.8.1 Anterior segment (2)     6.8.2 Posterior segment (4)   6.9 Computerized image analysis (0)     6.9.1 Laser scanning (0)       6.9.1.1 Confocal Scanning Laser Ophthalmoscopy (13)       6.9.1.2 Confocal Scanning Laser Polarimetry (8)     6.9.2 Optical coherence tomography (1)       6.9.2.1 Anterior (4)       6.9.2.2 Posterior (39)     6.9.5 Other (9)   6.10 Fluorescein (ICG) angiography (0)     6.10.1 Anterior segment (0)     6.10.2 Posterior segment (0)   6.11 Bloodflow measurements (18)   6.12 Ultrasonography and ultrasound biomicroscopy (3)   6.13 Provocative tests (2)   6.19 Telemedicine (0)   6.20 Progression (6)   6.30 Other (0) 8 Refractive errors in relation to glaucoma (0)   8.1 Myopia (6)   8.2 Hypermetropia (0)   8.3 Contact lenses (0)   8.4 Refractive surgical procedures (0)   8.5 Other (0) 9 Clinical forms of glaucomas (0)   9.1 Developmental glaucomas (0)     9.1.1 Congenital glaucoma, Buphthalmos (6)     9.1.2 Juvenile glaucoma (9)     9.1.3 Syndromes of Axenfeld, Rieger, Peters, aniridia (8)     9.1.4 Other (1)   9.2 Primary open angle glaucomas (0)     9.2.1 Ocular hypertension (0)     9.2.2 Other risk factors for glaucoma (11)     9.2.3 Open angle glaucoma with elevated IOP (1)     9.2.4 Normal pressure glaucoma (13)   9.3 Primary angle closure glaucomas (0)     9.3.1 Acute primary angle closure glaucoma (pupillary block) (5)     9.3.2 Chronic primary angle closure glaucoma (pupillary block) (0)     9.3.3 Plateau iris syndrome (0)     9.3.4 Primary angle closure suspect (1)     9.3.5 Primary angle closure (5)     9.3.10 Other (0)   9.4 Glaucomas associated with other ocular and systemic disorders (0)     9.4.1 Steroid-induced glaucoma (6)     9.4.2 Glaucomas associated with disorders of the cornea, conjunctiva, sclera (1)       9.4.2.1 Iridocorneal endothelial syndrome (ICE, incl. irisatrophy) (2)       9.4.2.2 Posterior polymorphous dystrophy (0)       9.4.2.3 Fuchs' endothelial dystrophy (0)       9.4.2.5 Other (1)     9.4.3 Glaucomas associated with disorders of the iris and ciliary body (0)       9.4.3.1 Pigmentary glaucoma (0)       9.4.3.5 Other (0)     9.4.4 Glaucomas associated with disorders of the lens (0)       9.4.4.1 Exfoliation syndrome (10)       9.4.4.2 Glaucomas associated with cataracts (2)       9.4.4.3 Glaucomas associated with lens dislocation (0)       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 (5)       9.4.5.5 Other (9)     9.4.6 Glaucomas associated with inflammation, uveitis (6)     9.4.7 Glaucomas associated with ocular trauma (5)     9.4.8 Glaucomas associated with intraocular tumors (0)     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 (0)       9.4.11.1 Ciliary block (malignant) glaucoma (0)       9.4.11.2 Glaucomas in aphakia and pseudophakia (10)       9.4.11.3 Epithelial, fibrous, and endothelial proliferation (0)       9.4.11.4 Glaucomas associated with corneal surgery (7)       9.4.11.5 Glaucomas associated with vitreoretinal surgery (4)     9.4.15 Glaucoma in relation to systemic disease (16)     9.4.20 Other (0) 10 Differential diagnosis e.g. anterior and posterior ischemic optic neuropathy (1) 11 Medical treatment (0)   11.1 General management, indication (5)   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 (2)     11.3.4 Betablocker (5)     11.3.5 Other (0)   11.4 Prostaglandins (32)   11.5 Carbonic anhydrase inhibitors (0)     11.5.1 Systemic (0)     11.5.2 Topical (2)   11.6 Osmotic treatment (0)   11.7 Treatment of bloodflow (1)   11.8 Neuroprotection (21)   11.9 Gene therapy (3)   11.13 Combination therapy (1)     11.13.1 Betablocker and pilocarpine (0)     11.13.2 Betablocker and carbon anhydrase inhibitor (5)     11.13.3 Betablocker and brimonidine (0)     11.13.4 Betablocker and prostaglandin (3)     11.13.5 Other (0)   11.14 Investigational drugs; pharmacological experiments (22)   11.15 Other drugs in relation to glaucoma (3)   11.16 Vehicles, delivery systems, pharmacokinetics, formulation (29)   11.17 Cooperation with medical therapy e.g. persistency, compliance, adherence (6)   11.20 Other (3) 12 Surgical treatment (0)   12.1 General management, indication (4)   12.2 Laser iridotomy (3)   12.3 Laser iridoplasty (1)   12.4 Laser trabeculoplasty and other laser treatment of the angle (7)   12.7 Surgical iridectomy (0)   12.8 Filtering surgery (0)     12.8.1 Without tube implant (8)     12.8.2 With tube implant or other drainage devices (16)     12.8.3 Non-perforating (3)     12.8.4 Using laser (0)     12.8.5 Other (1)     12.8.10 Woundhealing antifibrosis (16)     12.8.11 Complications, endophthalmitis (9)   12.9 Trabeculotomy, goniotomy (4)   12.10 Cyclodestruction (1)   12.11 Cyclodialysis (1)   12.12 Cataract extraction (0)     12.12.1 Intracapsular (0)     12.12.2 Extracapsular (0)     12.12.3 Phacoemulsification (4)   12.14 Combined cataract extraction and glaucoma surgery (0)     12.14.1 Intracapsular (0)     12.14.2 Extracapsular (0)     12.14.3 Phacoemulsification (3)   12.15 Capsulotomy (0)   12.16 Vitrectomy (0)   12.17 Anesthesia (4)   12.20 Other (1) 13 Therapeutic prognosis and outcome (0)   13.1 Prognostic factors (0)   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 (0)     13.2.3 Other (0) 14 Costing studies; pharmacoeconomics (14) 15 Miscellaneous (15)

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Abstract #47638 Published in IGR 13-4

Causes of blindness in a special education school

Onakpoya OH; Adegbehingbe BO; Omotoye OJ; Adeoye AO
West African Journal of Medicine 2011; 30: 47-50

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BACKGROUND: Blind children and young adults have to overcome a lifetime of emotional, social and economic difficulties. They employ non-vision dependent methods for education. OBJECTIVE: To assess the causes of blindness in a special school in southwestern Nigeria to aid the development of efficient blindness prevention programmes. METHODS: A cross-sectional survey of the Ekiti State Special Education School, Nigeria was conducted in May-June 2008 after approval from the Ministry of Education. All students in the blind section were examined for visual acuity, pen-torch eye examination and dilated fundoscopy in addition to taking biodata and history. RESULTS: Thirty blind students with mean age of 18(plus or minus)7.3 years and male: female ratio of 1.7:1 were examined. Blindness resulted commonly from cataract eight (26.7%), glaucoma six (20%) retinitis pigmentosa four (16.7%) and posttraumatic phthysis bulbi two (6.7%). Blindness was avoidable in 18 (61%) of cases. Glaucoma blindness was associated with redness, pain, lacrimation and photophobia in 15 (50%) and hyphaema in 16.7% of students; none of these students were on any medication at the time of study. CONCLUSION: The causes of blindness in rehabilitation school for the blind are largely avoidable and glaucoma-blind pupils face additional painful eye related morbidity during rehabilitation. While preventive measures and early intervention are needful against childhood cataract and glaucoma, regular ophthalmic consultations and medications are needed especially for glaucoma blind pupils.

O. H. Onakpoya. Ophthalmology Unit, Obafemi Awolowo University Teaching Hospital, Ile-Ife, Nigeria. Email: uvtoyin2@yahoo.co.uk

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Classification:

1.5 Glaucomas as cause of blindness (Part of: 1 General aspects)
9.1.2 Juvenile glaucoma (Part of: 9 Clinical forms of glaucomas > 9.1 Developmental glaucomas)

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