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Related Experiment Videos

Cataract survey in the local area using photographic documentation.

K Sasaki1, K Karino, M Kojima

  • 1Department of Ophthalmology, Kanazawa Medical University, Uchinada, Japan.

Developments in Ophthalmology
|January 1, 1987
PubMed
Summary

Cataract prevalence increases significantly with age, reaching 100% in individuals in their 80s. Opacification types shift from cortical to mixed and nuclear forms in older populations.

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Area of Science:

  • Ophthalmology
  • Epidemiology
  • Gerontology

Background:

  • Cataract is a leading cause of vision impairment globally.
  • Understanding age-related prevalence and types of cataract is crucial for public health.
  • Previous epidemiological data may vary by population and methodology.

Purpose of the Study:

  • To determine the prevalence and types of cataract in a local population aged 40 and above.
  • To analyze the relationship between age and cataract development.
  • To document changes in cataract morphology with advancing age.

Main Methods:

  • An epidemiological survey involving 1,020 individuals over 40 years old.
  • Crystalline lens examination using Scheimpflug and retroillumination photography.

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  • Classification of cataractous changes (early senile, incipient, prominent) and opacification types (cortical, subcapsular, nuclear, mixed).

    • Main Results:

    • Cataract prevalence increased with age: 33.9% (40s) to 100% (80s).
    • Prominent cataractous opacification rose from 1.6% (40s) to 57.1% (80s).
    • Opacification type shifted from predominantly cortical before 60 to mixed/nuclear after 70, with increased pure nuclear types in the elderly.

    Conclusions:

    • Cataract prevalence is strongly age-dependent, affecting all individuals in their 80s.
    • The pattern of cataract opacification evolves with age, with nuclear and mixed types becoming more common in older adults.
    • These findings highlight the significant impact of aging on lens health and visual impairment.