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Related Experiment Videos

An improved screen for use with the auto-plot perimeter

F Feldman, F Unger

    Canadian Journal of Ophthalmology. Journal Canadien D'Ophtalmologie
    |October 1, 1977
    PubMed
    Summary
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    A new curved screen for the Auto-Plot perimeter corrects for variations in test spot size and illumination, improving central visual field analysis. This inexpensive modification enhances the accuracy of visual field testing.

    Area of Science:

    • Ophthalmology
    • Visual Science
    • Medical Devices

    Background:

    • The Auto-Plot perimeter is used for analyzing the central visual field (30 degrees).
    • It offers adjustable test spots (size, color) and rapid data recording.
    • A flat projection screen causes variations in test spot size and illumination as targets move.

    Purpose of the Study:

    • To address the limitations of the Auto-Plot perimeter's flat screen.
    • To develop an inexpensive modification for improved visual field analysis.

    Main Methods:

    • A curved screen was designed and implemented for the Auto-Plot perimeter.
    • This modification aims to standardize test spot appearance across the visual field.

    Main Results:

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    • The curved screen eliminates disadvantages associated with the flat screen.
    • Consistent test spot size and illumination are maintained across the tested visual field.

    Conclusions:

    • The inexpensive curved screen effectively overcomes the Auto-Plot perimeter's flat screen limitations.
    • This enhancement improves the reliability and accuracy of central visual field testing.