title: Outcomes of cataract surgery in urban southern China: the Liwan Eye Study.
abstract: OBJECTIVE
  The outcomes of cataract surgery have been well reported in rural China; however, the situation in the urban population remains unclear. This study assessed the outcomes of cataract surgery in urban southern China.
  
  
  METHODS
  Data were gathered from the Liwan Eye Study, a population-based, cross-sectional study conducted in people aged 50 years or more in the Liwan District of Guangzhou. Presenting and best corrected visual acuity and a detailed eye examination were performed. For all aphakic and pseudophakic participants identified, information on the date, setting, type, and complications of cataract surgery were recorded.
  
  
  RESULTS
  Of the 1405 participants, 62 people (90 eyes) had undergone cataract surgery. Of those, 54.4% underwent the phacoemulsification (Phaco) technique, 33.3% extracapsular cataract extraction (ECCE) with intraocular lens (IOL) implantation, and 11.1% ECCE without IOL; 1 patient had intracapsular cataract extraction (ICCE). Presenting visual acuity (PVA) was >6/18 in 56 (62.2%) eyes, <6/18 to >6/60 in 20 (22.2%) eyes, <6/60 to >3/60 in 3 (3.3%) eyes, and <3/60 in 11(12.3%) eyes. Of the 34 eyes with PVA less than 6/18, the principal causes were 26.5% retinal abnormalities, 20.6% glaucoma, 35.3% uncorrected aphakia or refractive error, and 14.5% posterior capsule opacification (PCO).
  
  
  CONCLUSIONS
  ECCE or Phaco with IOL are the major surgical techniques used in urban southern China. More than half of the eyes with poor outcomes due to uncorrected aphakia, refractive error, or PCO are potentially treatable. This result suggests a pressing need for improved surgical training and postoperative care.
authors.affiliation: Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
authors.forename: Wenyong
authors.initials: W
authors.lastname: Huang
authors.forename: Guofu
authors.initials: G
authors.lastname: Huang
authors.forename: Dandan
authors.initials: D
authors.lastname: Wang
authors.forename: Qiuxia
authors.initials: Q
authors.lastname: Yin
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Foster
authors.forename: Mingguang
authors.initials: M
authors.lastname: He
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001036:Aphakia, Postcataract / Q000503:physiopathology; D002386:Cataract / Q000453:epidemiology*; D002387:Cataract Extraction / Q000706:statistics & numerical data*; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000706:statistics & numerical data*; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification / Q000706:statistics & numerical data; D015995:Prevalence; D019591:Pseudophakia / Q000503:physiopathology; D016896:Treatment Outcome; D014505:Urban Population / Q000706:statistics & numerical data*; D014786:Vision Disorders / Q000534:rehabilitation; D014792:Visual Acuity / Q000502:physiology