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A population-based study of lens opactities

J Xu1, Q Yu, S Zhu

  • 1Zhongshan Opthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou, China.

Yan Ke Xue Bao = Eye Science
|September 1, 1996
PubMed
Summary

Age-related lens opacity is a major cause of vision loss. This study found varying prevalence of nuclear, cortical, and subcapsular lens opacities in adults over 45, increasing with age and higher in females.

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Area of Science:

  • Ophthalmology
  • Public Health
  • Gerontology

Background:

  • Age-related lens opacity is a leading cause of vision impairment globally.
  • Understanding the prevalence and incidence of lens opacity is crucial for public health initiatives.

Purpose of the Study:

  • To investigate the prevalence and incidence of age-related lens opacity.
  • To provide population-based data on lens opacity in a Chinese adult population.

Main Methods:

  • A population-based study involving 1817 eyes from 932 adults aged 45 and above.
  • Random sampling from four villages in Doumen, Guangdong Province, China.
  • Lens opacities were graded using the Lens Opacities Classification System II (LOCS-II).

Main Results:

  • Prevalence rates for nuclear color, nuclear opacity, cortical opacity, and subcapsular opacity were 16.1%, 28.6%, 30.3%, and 8.7%, respectively.
  • The frequency of all four types of lens opacities increased with advancing age.
  • Higher prevalence of lens opacities was observed in females compared to males.

Conclusions:

  • The study provides essential prevalence data for lens opacities in a population-based setting.
  • Findings offer foundational information for future longitudinal cohort studies on vision impairment.

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