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Related Experiment Videos

A portable hemianopsia tester

H Bynke, A Heijl

    Acta Ophthalmologica
    |April 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    A new pocket-size static perimeter effectively detects visual field defects, especially hemianopic ones, in non-cooperative patients like those bedridden. This portable device aids in diagnosing visual impairments in challenging clinical settings.

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    Area of Science:

    • Ophthalmology
    • Medical Devices
    • Visual Field Testing

    Background:

    • Assessing visual field defects is crucial for diagnosing neurological and ophthalmological conditions.
    • Traditional visual field testing methods require patient cooperation and specific equipment, limiting their use in certain populations.
    • Bedridden or uncooperative patients often pose challenges for standard visual field examinations.

    Purpose of the Study:

    • To introduce and evaluate a novel pocket-size static perimeter for visual field assessment.
    • To determine the efficacy of this device in detecting hemianopic defects.
    • To assess its utility in patients unable to cooperate with conventional testing methods.

    Main Methods:

    • A pocket-size static perimeter with four test lights (one per quadrant) was developed.

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  • The device was applied to 190 visual fields across 97 patients.
  • Its performance was compared to the confrontation test in a subset of 12 fields (7 patients).

    • Main Results:

    • The static perimeter successfully disclosed hemianopic defects.
    • The instrument proved particularly advantageous for bedridden and uncooperative patients.
    • It offered a viable alternative when standard methods, including confrontation testing, were not feasible.

    Conclusions:

    • The pocket-size static perimeter is a valuable tool for visual field testing, especially in challenging patient groups.
    • Its portability and ease of use make it suitable for bedside examinations.
    • This device enhances diagnostic capabilities for visual field defects in limited-cooperation scenarios.