title: [An epidemiological survey of low vision and blindness of senile persons in Beixinjing blocks, Shanghai].
abstract: OBJECTIVE
  To investigate the morbidities of low vision and blindness and the leading cause of blindness in residents aged >or= 60 years in Beixinjing blocks, Shanghai.
  
  
  METHODS
  The vision archives were first established for total old residents. The pinhole visual acuity was recorded and classified under WHO grading system. Assigned ophthalmologic doctors assured the leading blind causes of every blind person.
  
  
  RESULTS
  The response rates in 1994, 1997 and 2000 were 83.87%, 88.32% and 91.98% respectively. The morbidities of low vision and blindness in these 3 years were 3.61% and 1.51%, 2.31% and 1.09%, 1.31% and 0.71% respectively. The leading causes of blindness were degenerative retinopathy (including age-related maculopathy), cataract, corneal diseases and retinal angiopathy (including hypertensive and diabetic retinopathy, retinal artery or venous occlusion, etc).
  
  
  CONCLUSIONS
  The morbidities of low vision and blindness in this area decreased from 1994. The leading cause of blindness was degenerative retinopathy.
authors.affiliation: Department of Ophthalmology, Shanghai First People's Hospital, Shanghai 200080, China. zouhaidong@263.net
authors.forename: Haidong
authors.initials: H
authors.lastname: Zou
authors.forename: Xi
authors.initials: X
authors.lastname: Zhang
authors.forename: Xun
authors.initials: X
authors.lastname: Xu
authors.forename: Weiwei
authors.initials: W
authors.lastname: Wang
authors.forename: Guiping
authors.initials: G
authors.lastname: Li
authors.forename: Hong
authors.initials: H
authors.lastname: Yu
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001766:Blindness / Q000453:epidemiology* / Q000209:etiology; D002681:China / Q000453:epidemiology; D006801:Humans; D008875:Middle Aged; D009017:Morbidity; D012162:Retinal Degeneration / Q000150:complications; D015354:Vision, Low / Q000453:epidemiology*