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The Etiology of Vision Impairment in Target Population

Eye Science 1996年第3期16卷 118-120页

作者： siping zhu, jingjing xu,{2., qing liuzhongshan ophthalmic center, sun Yat-sen university of medical sciensces, guangzhou 510060, china Zhongshan ophthalmic center Sun Yat-sen University of Medical Sciensces Guangzhou China.

Purpose: research the etiology of vision impairment in target persons over 45 years old in Doumen county , Guangdong ***: Depending on the prevalences of the blindness among the person aged over 50 years, the theoretic sample rate is 1 000/4 8733×100%=2. 05%. The 8 districts were divided into 3 parts according to the local economic situation and the proportion of the population in the areas. In fact, the sampling rate is 932. 10055 = 88.34%.Results:W’e found that impairment 2.%, respectively. Both prevalences of blindness and low vision were increased with age. The leading cuase of blindness was cataract (45. 2.). The second was corneal opacity (16. 7% ). Prevalentces of the low vision and the blindness were higher in females than in males (P<0. 005).Conclusions: Curable and preventable diseases were the leading cause for the blindness (70%). Prevalences of blindness and the low vision

关键词： blindness low vision epidemiology

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A Population-based Study of Lens Opactities

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Eye Science 1996年第3期16卷 115-117页

作者： jingjing xu,{2., siping zhu, qing liuzhongshan ophthalmic center, sun Yat-sen university of medical Sciences,guangzhou 510060,china Zhongshan Opthalmic center Sun Yat-sen University of Medical Sciences Guangzhou China.

Purpose: Age-related lens opacity is the main cause of vision disablitity in elderly population all over the world. This study was designed to investigate the prevalence and incidence of lens ***: 1817 eyes of 932.adults over 45 year-old were sampled randomly from 4 villeges within Doumen, a county located in the south of Guangdong provience, china. The procedure of the examination was performed by ophthalmologists. The lens opacities were graded according to a standarized photo of the Lens Opacities Classification System II (LOGS- II ).Results: The prevalence of lens opacities in nuclear color, nuclear opacity, cortical opacity and subcapsular opacity was 16. 1% , 2..,6% , 30. 3% and 8. 7% , respectively. The frequency of all four types of opacities increased with age. The prevalence of lens opacities in four types was higher in female than that in male. Conclusion: The data we got are important for prevalence of lens opacities of population-based study as well as basic information for

关键词： lens opacities epidemiology

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