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Related Experiment Videos

The normal visual field on the Humphrey field analyzer.

R S Brenton, C D Phelps

    Ophthalmologica. Journal International D'Ophtalmologie. International Journal of Ophthalmology. Zeitschrift Fur Augenheilkunde
    |January 1, 1986
    PubMed
    Summary

    This study established normal visual field data for 102 subjects. Average light sensitivity declines with age, particularly in peripheral vision, but the overall visual field shape remains consistent.

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    Area of Science:

    • Ophthalmology
    • Visual Science
    • Gerontology

    Background:

    • Establishing normative data for visual field testing is crucial for diagnosing visual impairments.
    • Automated perimetry is a standard method for assessing visual function.
    • Understanding age-related changes in visual fields is important for clinical interpretation.

    Purpose of the Study:

    • To create a comprehensive database of normal visual field data.
    • To analyze age-related changes in visual sensitivity and visual field characteristics.
    • To provide reference data for the Humphrey automated perimeter.

    Main Methods:

    • Tested central and peripheral visual fields of 102 healthy subjects using Humphrey automated perimeter.
    • Ensured all eyes were rigorously examined to confirm normality.
    • Calculated population means and standard deviations for each test location, stratified by age decade.

    Main Results:

    • Average differential light sensitivity decreased with age: -0.5 dB/decade at fixation, -0.6 dB/decade centrally, and -0.6 dB/decade peripherally.
    • The slope and shape of the visual field 'hill of vision' did not change significantly with aging.
    • Short-term fluctuation in visual fields was greater in the periphery compared to the center.

    Conclusions:

    • Age-related decline in differential light sensitivity is a normal finding.
    • The structural integrity of the visual field remains stable across different age groups.
    • Perimetric data from this study provides a valuable normative reference for clinical and research applications.

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