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Repeated automatic visual field screening in a cohort study.

B Bengtsson

    Acta Ophthalmologica
    |April 1, 1985
    PubMed
    Summary
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    Repeated automatic visual field screening is feasible in population studies. However, this method offers limited clinical value due to common irrelevant defects and restricted yield in detecting relevant visual field changes.

    Area of Science:

    • Ophthalmology
    • Public Health
    • Medical Diagnostics

    Background:

    • Population studies are crucial for understanding disease prevalence.
    • Visual field screening aids in detecting vision impairments.
    • Automatic perimetry offers a standardized method for visual field assessment.

    Purpose of the Study:

    • To evaluate the feasibility and yield of repeated automatic visual field screening in a population cohort.
    • To assess the repeatability of visual field defects over a three-year interval.

    Main Methods:

    • Automatic visual field screening was conducted in 1511 individuals (born 1907-1921) during 1977-1978.
    • The screening was repeated on 2565 eyes of 1293 individuals three years later.
    • Analysis focused on the repeatability of 'relevant' and 'irrelevant' visual field defects.

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    Main Results:

    • A high prevalence of 'irrelevant' visual field defects was observed, with limited repeatability.
    • 'Relevant' visual field defects were consistently detected in both surveys.
    • The clinical yield from the second screening was found to be restricted.

    Conclusions:

    • Repeated automatic visual field screening is technically feasible within population studies.
    • The clinical utility of repeat screening is limited by the prevalence of non-reproducible defects and a low yield of significant findings.