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Prevalence, Causes and Socio-Economic Determinants of Vision Loss in Cape Town, South Africa

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  • Nicky Cockburn
  • David Steven
  • Karin Lecuona
  • Francois Joubert
  • Graeme Rogers
  • Colin Cook
  • Sarah Polack

Abstract

Purpose: To estimate the prevalence and causes of blindness and visual impairment in Cape Town, South Africa and to explore socio-economic and demographic predictors of vision loss in this setting. Methods: A cross sectional population-based survey was conducted in Cape Town. Eighty-two clusters were selected using probability proportionate to size sampling. Within each cluster 35 or 40 people aged 50 years and above were selected using compact segment sampling. Visual acuity of participants was assessed and eyes with a visual acuity less than 6/18 were examined by an ophthalmologist to determine the cause of vision loss. Demographic data (age, gender and education) were collected and a socio-economic status (SES) index was created using principal components analysis. Results: Out of 3100 eligible people, 2750 (89%) were examined. The sample prevalence of bilateral blindness (presenting visual acuity

Suggested Citation

  • Nicky Cockburn & David Steven & Karin Lecuona & Francois Joubert & Graeme Rogers & Colin Cook & Sarah Polack, 2012. "Prevalence, Causes and Socio-Economic Determinants of Vision Loss in Cape Town, South Africa," PLOS ONE, Public Library of Science, vol. 7(2), pages 1-7, February.
    • Handle: RePEc:plo:pone00:0030718
    DOI: 10.1371/journal.pone.0030718
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