title: Prevalence and Visual Outcomes of Cataract Surgery in Rural South India: A Cross-Sectional Study.
abstract: To determine the prevalence of cataract surgery and postoperative vision-related outcomes, especially with respect to sex, socioeconomic status (SES) and site of first contact with eye care, in a rural area of South India.
  
  
  
  In a population-based cross-sectional survey of 5530 individuals aged 50 years or older from 10 villages selected by cluster sampling, individuals who had undergone cataract surgery in one or both eyes were identified. Consenting participants were administered a questionnaire, underwent vision assessment and ophthalmic examination. Outcomes were classified as good if visual acuity of the operated eye was 6/18 or better, fair if worse than 6/18 but better than or equal to 6/60, and poor if worse than 6/60.
  
  
  
  Prevalence of cataract surgery in this age group (771 persons) was 13.9% (95% confidence interval, CI, 13.0-14.9%). In the 1112 eyes of 749 persons studied, at presentation, 53.1% (95% CI 50.1-56.1%) of operated eyes had good, 38.1% (95% CI 35.2-41.0%) had fair, and 8.8% (95% CI 7.1-10.5%) had poor outcomes. With pinhole, 75.2% (95% CI 72.6-77.8%) had good, 17.2% (95% CI 14.9-19.5%) had fair, and 7.4% (95% CI 5.8-9.0%) had poor outcomes. In 76.3% of eyes with fair and poor presenting outcomes we detected an avoidable cause for the suboptimal visual acuity. Place of surgery and duration since surgery of 3 years or more were risk factors for blindness, while SES, sex and site of first eye care contact were not.
  
  
  
  The high prevalence of avoidable causes of visual impairment in this rural setting indicates the scope for preventive strategies.
authors.affiliation: a Department of Ophthalmology , Christian Medical College , Vellore , India.
authors.forename: P
authors.initials: P
authors.lastname: Paul
authors.affiliation: a Department of Ophthalmology , Christian Medical College , Vellore , India.
authors.forename: T
authors.initials: T
authors.lastname: Kuriakose
authors.affiliation: b Department of Community Health , Christian Medical College , Vellore , India.
authors.forename: J
authors.initials: J
authors.lastname: John
authors.affiliation: a Department of Ophthalmology , Christian Medical College , Vellore , India.
authors.forename: R
authors.initials: R
authors.lastname: Raju
authors.affiliation: b Department of Community Health , Christian Medical College , Vellore , India.
authors.forename: K
authors.initials: K
authors.lastname: George
authors.affiliation: a Department of Ophthalmology , Christian Medical College , Vellore , India.
authors.forename: A
authors.initials: A
authors.lastname: Amritanand
authors.affiliation: a Department of Ophthalmology , Christian Medical College , Vellore , India.
authors.forename: P A
authors.initials: PA
authors.lastname: Doss
authors.affiliation: b Department of Community Health , Christian Medical College , Vellore , India.
authors.forename: J
authors.initials: J
authors.lastname: Muliyil
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D001766:Blindness / Q000453:epidemiology; D002386:Cataract / Q000453:epidemiology* / Q000517:prevention & control; D002387:Cataract Extraction / Q000706:statistics & numerical data*; D016000:Cluster Analysis; D003430:Cross-Sectional Studies; D005260:Female; D006297:Health Services Accessibility / Q000592:standards; D006801:Humans; D007194:India / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D015995:Prevalence; D012030:Refractive Errors / Q000453:epidemiology; D012424:Rural Population / Q000706:statistics & numerical data*; D017678:Sex Distribution; D012959:Socioeconomic Factors; D014792:Visual Acuity
keywords: Avoidable blindness; cataract surgery; eye camp; prevalence; visual outcomes