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The prevalence of glaucoma

B Bengtsson

    The British Journal of Ophthalmology
    |January 1, 1981
    PubMed
    Summary

    This study investigated glaucoma prevalence in a Swedish population. Most glaucoma cases had limited impact on visual capacity, with many previously undiagnosed.

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    Area of Science:

    • Ophthalmology
    • Public Health
    • Epidemiology

    Background:

    • Glaucoma is a leading cause of irreversible blindness worldwide.
    • Understanding glaucoma prevalence is crucial for public health planning and early intervention.
    • Previous studies have varied in their estimation of glaucoma prevalence due to differing methodologies.

    Purpose of the Study:

    • To estimate the prevalence of glaucoma in a defined Swedish population.
    • To assess the proportion of known versus unknown glaucoma cases.
    • To evaluate the impact of glaucoma on visual capacity within the studied cohort.

    Main Methods:

    • Population-based study of 1963 individuals born between 1907-1921.
    • Examination of 1511 subjects using standardized methods, including automatic perimetry.
    • Strict diagnostic criteria were applied to identify glaucoma cases.

    Main Results:

    • Approximately 20% of all glaucoma cases with visual field defects were previously known.
    • Among 15 newly identified glaucoma cases, only 7 had intraocular pressures above 20.5 mmHg.
    • The reduction in visual capacity attributable to glaucoma in this population was limited.

    Conclusions:

    • A significant proportion of glaucoma cases in this population remained undiagnosed prior to the study.
    • Glaucoma's impact on visual function was minimal in the majority of affected individuals.
    • Population-based studies are essential for accurate glaucoma prevalence estimation and understanding its clinical impact.

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