title: Gonioscopy findings and prevalence of occludable angles in a Burmese population: the Meiktila Eye Study.
abstract: OBJECTIVE
  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).
  
  
  CONCLUSIONS
  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.
authors.affiliation: Department of Ophthalmology & Visual Sciences, South Australian Institute of Ophthalmology, Adelaide University, South Australia 5000, Australia. robert.casson@adelaide.edu.au
authors.forename: R J
authors.initials: RJ
authors.lastname: Casson
authors.forename: H S
authors.initials: HS
authors.lastname: Newland
authors.forename: J
authors.initials: J
authors.lastname: Muecke
authors.forename: S
authors.initials: S
authors.lastname: McGovern
authors.forename: L M
authors.initials: LM
authors.lastname: Abraham
authors.forename: W K
authors.initials: WK
authors.lastname: Shein
authors.forename: D
authors.initials: D
authors.lastname: Selva
authors.forename: T
authors.initials: T
authors.lastname: Aung
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D004812:Epidemiologic Methods; D005260:Female; D015812:Glaucoma, Angle-Closure / Q000175:diagnosis / Q000453:epidemiology*; D006068:Gonioscopy; D006801:Humans; D008297:Male; D008875:Middle Aged; D002052:Myanmar / Q000453:epidemiology; D012423:Rural Health / Q000706:statistics & numerical data; D012720:Severity of Illness Index; D017678:Sex Distribution