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Gonioscopy findings and prevalence of occludable angles in a Burmese population: the Meiktila Eye Study.

Casson RJ, Newland HS, Muecke J, McGovern S, Abraham LM, Shein WK, Selva D, Aung T

Department of Ophthalmology & Visual Sciences, South Australian Institute of Ophthalmology, Adelaide University, South Australia 5000, Australia. robert.casson@adelaide.edu.au

AIM: To determine the prevalence of preglaucomatous angle-closure disease in central Myanmar. METHODS: A population-based survey of inhabitants >or=40 years in the Meiktila District was carried out; 2481 subjects were identified, 2076 participated and 2060 underwent gonioscopy of at least one eye. Eyes with angles traditionally described as "occludable" were recorded as primary angle-closure suspects (PACS); eyes with PACS and peripheral anterior synechiae (PAS), or an increased intraocular pressure but without primary angle-closure glaucoma, were recorded as primary angle closure (PAC). RESULTS: The prevalence of PACS in at least one eye was 5.7% (95% CI 4.72 to 6.62); prevalence increased with age and was more common in women (p<0.001). The prevalence of PAC in at least one eye was 1.50% (95% CI 1.47 to 1.53). All participants with PAS had at least 90 degrees of closure (range 90-360 degrees). CONCLUSION: The prevalence of preglaucomatous angle-closure disease (PACS and PAC) in this population was 5.7% and 1.5%, respectively. PACS was more common in women, and its prevalence increased with age.

Published 19 June 2007 in Br J Ophthalmol, 91(7): 856-9.
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