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1 General aspects (0)   1.1 Epidemiology (2)   1.2 Population genetics (1)   1.3 Pathogenesis (0)   1.4 Quality of life (4)   1.5 Glaucomas as cause of blindness (0)   1.6 Prevention and screening (3) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (0)   2.2 Cornea (3)   2.3 Sclera (0)   2.4 Anterior chamber angle (1)   2.5 Meshwork (0)     2.5.1 Trabecular meshwork (10)     2.5.2 Schlemms canal (0)     2.5.3 Scleral outlet channels (0)   2.6 Aqueous humor dynamics (1)     2.6.1 Production (0)     2.6.2 Outflow (1)       2.6.2.1 Trabecular meshwork (0)       2.6.2.2 Uveoscleral (0)     2.6.3 Compostion (2)   2.7 Episcleral veins and venous pressure (0)   2.8 Iris (0)   2.9 Ciliary body (0)   2.10 Lens (0)   2.11 Vitreous body (0)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (0)   2.13 Retina and retinal nerve fibre layer (12)   2.14 Optic disc (9)   2.15 Optic nerve (4)   2.16 Chiasma and retrochiasmal central nervous system (2)   2.17 Stem cells (0)   2.20 Other (0) 3 Laboratory methods (5)   3.1 Microscopy (0)   3.2 Electron microscopy (2)   3.3 Immunohistochemistry (3)   3.4 Molecular genetics (1)     3.4.1 Linkage studies (9)     3.4.2 Gene studies (5)   3.5 Molecular biology incl. 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Without tube implant (4)     12.8.2 With tube implant or other drainage devices (11)     12.8.3 Non-perforating (11)     12.8.4 Using laser (0)     12.8.5 Other (0)     12.8.10 Woundhealing antifibrosis (9)     12.8.11 Complications, endophthalmitis (10)   12.9 Trabeculotomy, goniotomy (3)   12.10 Cyclodestruction (8)   12.11 Cyclodialysis (0)   12.12 Cataract extraction (0)     12.12.1 Intracapsular (0)     12.12.2 Extracapsular (1)     12.12.3 Phacoemulsification (5)   12.14 Combined cataract extraction and glaucoma surgery (1)     12.14.1 Intracapsular (0)     12.14.2 Extracapsular (0)     12.14.3 Phacoemulsification (3)   12.15 Capsulotomy (1)   12.16 Vitrectomy (1)   12.17 Anesthesia (1)   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 (2) 15 Miscellaneous (3)

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Abstract #10794 Published in IGR 6-2

Ultrasound biomicroscopic findings in aniridia

Okamoto F; Nakano S; Okamoto C; Hommura S; Oshika T
American Journal of Ophthalmology 2004; 137: 858-62

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PURPOSE: To describe the ultrasound biomicroscopic features of eyes with aniridia. DESIGN: Observational case series. METHODS: Nineteen eyes of 10 patients with aniridia (six males and four females) ranging in age from 3 months to 53 years (21.0 ± 16.4, mean ± SD), and 50 normal subjects (30 men and 20 women) ranging from 16 to 56 years (31.1 ± 13.2) were evaluated. Ultrasound biomicroscopic findings were recorded in the 3-, 6-, 9-, and 12-o'clock directions. Adult patients (aged 16 years or older) with aniridia were compared with the age-matched controls. RESULTS: Ultrasound biomicroscopy (UBM) detected extremely tiny irises in all eyes with aniridia. The eyes with aniridia showed significantly smaller values than the controls in ciliary body length (4.49 ± 0.63 versus 5.79 ± 0.44 mm, P <.001, unpaired Student t test), ciliary body thickness (0.75 ± 0.17 versus 1.24 ± 0.22 mm, P <.001), iris root thickness (0.47 ± 0.14 versus 0.61 ± 0.07 mm, P <.001), scleral-ciliary process angle (31.7 ± 3.26 versus 43.1 ± 4.48 degree, P <.001), and anterior chamber depth (1.99 ± 0.43 versus 2.94 ± 0.34 mm, P <.001). In the aniridia eyes, there was a significantly positive correlation between iris thickness and ciliary body thickness (Pearson r = 0.829, P =.001). CONCLUSION: Ultrasound biomicroscopic imaging demonstrated that not only iris hypoplasia but also ciliary body hypoplasia exist in aniridia. Anterior inclination of the ciliary process was also found, which was thought to be at least partly responsible for the shallow anterior chamber.

Department of Ophthalmology, Institute of Clinical Medicine, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8575, Japan. Fumiki-o@md.tsukuba.ac.jp

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Classification:

6.12 Ultrasonography and ultrasound biomicroscopy (Part of: 6 Clinical examination methods)
9.1.3 Syndromes of Axenfeld, Rieger, Peters, aniridia (Part of: 9 Clinical forms of glaucomas > 9.1 Developmental glaucomas)

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