title: Intermediate-Term Cataract Surgery Outcomes from Rural Provinces in Lao People's Democratic Republic.
abstract: OBJECTIVE
  Limited data are available about cataract surgery outcomes from developing regions in South-East Asia, but are necessary to monitor the impact of ongoing program delivery as outlined in the World Health Organization Vision 2020 directives.
  
  
  METHODS
  We conducted a retrospective cohort study of 488 eyes of 449 patients who had undergone cataract surgery in 2011 in Luang Prabang and Xayaboury provinces of northwestern Lao People's Democratic Republic (Lao PDR). The study included 400 eyes of 361 subjects (80.4% of the target population). The main outcomes were presenting and pinhole visual acuity (VA).
  
  
  RESULTS
  Subjects' mean age was 68 years (standard deviation 12.1 years); 52.6% were women. Preoperative presenting VA in the operated eye was <6/60 in all patients where presenting VA data was available (76.4%). Presenting VA in the operated eye was >6/18 in 185/400 eyes (46.3%, 95% confidence interval, CI, 41.4-51.2%), <6/18-6/60 in 177/400 (44.3%, 95% CI 39.4-49.2%) and <6/60 in 38/400 (9.5%, 95% CI 6.6-12.4%). VA improved two or more lines in 61/400 eyes (15.3%, 95% CI 11.7-18.8%) with pinhole. Relative afferent pupillary defect was present in 13/400 eyes (3.3%, 95% CI 1.5-5.0%).
  
  
  CONCLUSIONS
  Presenting postoperative VA did not meet the World Health Organization criteria for good outcomes. Further study is required to determine specific factors contributing to adverse outcomes in this population.
authors.affiliation: South Australian Institute of Ophthalmology, University of Adelaide, and Sight for All , Australia and.
authors.forename: Melissa Kate
authors.initials: MK
authors.lastname: Shields
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Casson
authors.forename: James
authors.initials: J
authors.lastname: Muecke
authors.forename: Sengla
authors.initials: S
authors.lastname: Laosern
authors.forename: Phoumpanya
authors.initials: P
authors.lastname: Louangsouksa
authors.forename: Somchit
authors.initials: S
authors.lastname: Vannavong
authors.forename: Khamphoua
authors.initials: K
authors.lastname: Southisombath
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002386:Cataract / Q000453:epidemiology*; D002387:Cataract Extraction / Q000706:statistics & numerical data*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007812:Laos / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012424:Rural Population / Q000706:statistics & numerical data*; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology*
keywords: Blindness; Lao PDR; cataract surgery; rural; visual outcome