[The prevalence of cataract in Doumen County, Guangdong Province].
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.
Xu
J
J
Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou 510060.
He
M
M
Wu
K
K
Li
S
S
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