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Normal visual fields measured with Octopus-Program G1. II. Global visual field indices

M Zulauf1, R P LeBlanc, J Flammer

  • 1Yale Eye Center, New Haven, CT 06510-8061.

Graefe'S Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Fur Klinische Und Experimentelle Ophthalmologie
|September 1, 1994
PubMed
Summary
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This study determined normal variability for global visual field indices in healthy individuals. Mean sensitivity significantly decreases with age, aiding earlier detection of visual function loss.

Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Clinicians use global visual field indices for a succinct overview of visual field status.
  • Understanding the normal variability of these indices is crucial for accurate interpretation.

Purpose of the Study:

  • To determine the normal interindividual variability of global visual field indices.
  • To establish reference percentiles for these indices in a healthy population.

Main Methods:

  • Utilized a database from a multicenter study with Octopus 201 perimeters and Program G1.
  • Analyzed 824 visual fields from 139 healthy volunteers with prior visual field tests.

Main Results:

  • Mean sensitivity showed a significant linear decrease with age (0.064 dB/year).

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  • Loss variance, corrected loss variance, and short-term fluctuation did not significantly correlate with age.
  • Provided percentiles for key visual field indices.

    • Conclusions:

    • Age-related decline in mean sensitivity necessitates consideration in clinical evaluation.
    • Borderline visual field values warrant further investigation, especially in reliable subjects.
    • These findings can improve the evaluation of global visual field indices for earlier detection of visual dysfunction.