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Related Experiment Videos

The EOG ratio and its evaluation of retinal function

A J Afanador

    Journal of the American Optometric Association
    |September 1, 1977
    PubMed
    Summary

    Normal visual field ratios, assessed with 10 ft. lambert ganzfield illumination, exceed 200%. Ratios between 175% and 200% are suspicious, while below 175% indicate potential pathology.

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    Area of Science:

    • Ophthalmology
    • Visual Science
    • Medical Diagnostics

    Background:

    • Establishing normal parameters for visual field testing is crucial for accurate diagnosis.
    • Individual variations in patient responses can affect the interpretation of visual field data.

    Purpose of the Study:

    • To define normal ranges for visual field ratios using standardized illumination.
    • To differentiate between normal, low/suspicious, and abnormal visual field ratios.

    Main Methods:

    • Evaluation of 116 normal visual field ratios.
    • Utilized 10 ft. lambert ganzfield illumination for standardized testing.

    Main Results:

    • Ratios exceeding 200% were confirmed as normal.
    • A range of 175% to 200% was proposed as low or suspicious.
    • Ratios below 175% were identified as abnormal and diagnostically significant.

    Conclusions:

    • The study provides clear thresholds for interpreting visual field ratios.
    • Abnormal ratios below 175% are valuable indicators for diagnosing visual pathology.
    • Standardized ganzfield illumination aids in reliable visual field assessment.

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