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Related Experiment Videos

The Peritest, a new automatic and semi-automatic perimeter

E L Greve, F Dannheim, D Bakker

    International Ophthalmology
    |November 1, 1982
    PubMed
    Summary
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    The Peritest, a new visual field perimeter, effectively detects early glaucoma and peripheral defects missed by traditional methods. This advanced tool aids in assessing visual field loss with improved accuracy and speed.

    Area of Science:

    • Ophthalmology
    • Medical Devices
    • Visual Field Testing

    Background:

    • Visual field defects, particularly early glaucomatous changes, are often missed by routine kinetic perimetry.
    • Accurate and efficient assessment of visual fields is crucial for diagnosing and managing eye conditions.

    Purpose of the Study:

    • To introduce and evaluate the Peritest, a novel automatic and semi-automatic perimeter for visual field defect detection.
    • To assess the Peritest's efficacy in identifying small, early glaucomatous defects and peripheral visual field loss.

    Main Methods:

    • Utilized static perimetry with multiple or single LED stimuli across 206 positions.
    • Employed a threshold-related gradient adapted suprathreshold (0.6) strategy.
    • Results were presented using non-interpolated grey scales, separating general and local sensitivity reductions.

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    Main Results:

    • Detected 70% of small, early glaucomatous defects missed by routine kinetic perimetry.
    • Identified more peripheral defects (greater than 25 degrees) compared to kinetic perimetry.
    • Satisfactorily demonstrated defect configurations for moderate to large-sized defects.

    Conclusions:

    • The Peritest is a valuable tool for detecting early and peripheral visual field defects, including those indicative of glaucoma.
    • Its ability to separate general and local sensitivity reductions and measure patient reliability enhances diagnostic capabilities.
    • Examination times range from under 4 minutes to 10-20 minutes, offering flexibility for various clinical needs.