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[Specificity of suprathreshold computer perimetry]

E Gramer, G K Krieglstein

    Klinische Monatsblatter Fur Augenheilkunde
    |November 1, 1982
    PubMed
    Summary
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    Linear suprathreshold perimetry requires adjusting stimulus brightness to visual field eccentricity. This improves test specificity by accounting for the 3D distribution of retinal thresholds, especially in central vision areas.

    Area of Science:

    • Ophthalmology
    • Visual Neuroscience

    Context:

    • Linear suprathreshold computer perimetry is a common method for assessing visual field sensitivity.
    • The Fieldmaster 200 automatic perimeter was used to evaluate different testing conditions.
    • Existing methods face challenges with specificity, particularly in the periphery.

    Purpose:

    • To discuss problems in linear suprathreshold computer perimetry.
    • To analyze the impact of test conditions on perimetric results.
    • To propose an optimized approach for stimulus presentation.

    Summary:

    • Linear supraluminosity in test points, especially centrally, reduces peripheral specificity when sensitivity loss is not acceptable.
    • Considering the 3D distribution of retinal thresholds is crucial for accurate perimetry.

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  • Stimulus supraluminosity should be adapted based on the testing eccentricity.

    • Impact:

    • Provides insights into optimizing visual field testing protocols.
    • Aims to enhance the accuracy and reliability of computer perimetry.
    • Contributes to better detection and management of visual field defects.