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Related Experiment Videos

Tangent screen perimetry (continuing education credit)

N Garber

    Journal of Ophthalmic Nursing & Technology
    |March 1, 1994
    PubMed
    Summary

    Tangent screen perimetry assesses central vision fields. This visual field testing method helps detect glaucoma and neurological issues by mapping visual defects.

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    Area of Science:

    • Ophthalmology
    • Neurology
    • Medical Diagnostics

    Background:

    • Tangent screen perimetry is a key visual field test.
    • It evaluates the central visual field at specific distances.
    • Understanding its application is crucial for diagnosing visual impairments.

    Purpose of the Study:

    • To outline the methodology of tangent screen perimetry.
    • To highlight its utility in detecting specific visual field defects.
    • To ensure consistent and accurate visual field interpretation.

    Main Methods:

    • Testing the central 30 degrees field at 1 meter, or 12-15 degrees at 2 meters.
    • Maintaining constant fixation monitoring and moving targets from nonseeing to seeing areas at 5 degrees/second.
    • Utilizing specific protocols like Armaly/Drance for glaucoma and vertical meridian mapping for neurological conditions.

    Main Results:

    • Tangent screen perimetry effectively evaluates central visual field defects.
    • Testing at different distances alters the evaluated field size.
    • Standardized protocols and color coding enhance interpretation consistency.

    Conclusions:

    • Tangent screen perimetry is a valuable tool for assessing central visual fields.
    • The technique's parameters (distance, speed, protocols) are critical for accurate defect detection.
    • Consistent application aids in diagnosing conditions like glaucoma and neurological disorders.

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