title: [The prevalence of cataract in Doumen County, Guangdong Province].
abstract: OBJECTIVE
  To investigate the prevalence of cataract, cataract blindness and the cataract burden in population aged >or= 50 years in Doumen County.
  
  
  METHODS
  5,759 individuals aged >or= 50 were identified from sampling units. The definition of cataract was the vision < 0.7 caused by lens opacity in either eye, among them the person whose vision in both eyes was < 0.1 was cataract burden and whose vision in both eyes was < 0.05 was cataract blindness.
  
  
  RESULTS
  The response rate was 92.76%. The prevalence of cataract, cataract blindness and cataract burden was 20.93%, 1.67% and 3.86%, respectively.
  
  
  CONCLUSIONS
  The huge community necessary for cataract surgery still remains as a great challenge in China.
authors.affiliation: Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou 510060.
authors.forename: J
authors.initials: J
authors.lastname: Xu
authors.forename: M
authors.initials: M
authors.lastname: He
authors.forename: K
authors.initials: K
authors.lastname: Wu
authors.forename: S
authors.initials: S
authors.lastname: Li
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001766:Blindness / Q000453:epidemiology* / Q000209:etiology; D002386:Cataract / Q000150:complications / Q000453:epidemiology*; D002387:Cataract Extraction / Q000592:standards / Q000706:statistics & numerical data; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012423:Rural Health; D012737:Sex Factors