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Related Experiment Videos

Hysterical amblyopia: electrodiagnostic and clinical evaluation.

M S Berman, D M Levi

    American Journal of Optometry and Physiological Optics
    |April 1, 1975
    PubMed
    Summary

    Hysterical amblyopia, characterized by reduced acuity and constricted visual fields, did not show significant differences in dark adaptation or visual evoked responses (VER) compared to controls, suggesting intact visual pathways.

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    Area of Science:

    • Ophthalmology
    • Neuroscience

    Background:

    • Hysterical amblyopia is a functional visual disorder.
    • It presents with reduced visual acuity and visual field defects.

    Purpose of the Study:

    • To investigate the integrity of visual pathways in hysterical amblyopia.
    • To compare objective visual function tests between patients with hysterical amblyopia and healthy controls.

    Main Methods:

    • Evaluated six hysterical amblyopes and six age/sex-matched controls.
    • Assessed visual acuity, color vision, visual fields, dark adaptometry, and visual evoked responses (VER).

    Main Results:

    • Hysterical amblyopes exhibited reduced acuity and constricted visual fields.
    • No significant differences in dark adaptation thresholds were found between groups.

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  • Visual evoked responses (VER) did not statistically differentiate hysterical amblyopes from controls.

    • Conclusions:

    • The visual pathways, up to and including cortical area 17, appear to be intact in hysterical amblyopia.
    • Objective tests like dark adaptometry and VERs do not reveal abnormalities in this condition.