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Related Experiment Videos

Myasthenic sustained gaze fatigue

R H Osher, J S Glaser

    American Journal of Ophthalmology
    |March 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

    Sustained gaze fatigue, an early sign of myasthenia gravis, caused double vision in two patients. This ocular motility pattern suggests muscle fatigue and myoneural junction disease, aiding early diagnosis.

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    Area of Science:

    • Ophthalmology
    • Neurology

    Background:

    • Myasthenia gravis (MG) is a neuromuscular disorder affecting the myoneural junction.
    • Diplopia can be an initial presenting symptom of MG.

    Observation:

    • Two patients presented with diplopia as the first sign of myasthenia gravis.
    • Initially full ocular excursions showed a slow drift toward the primary position during sustained extreme gaze.

    Findings:

    • This specific motility pattern indicates pathological extraocular muscle fatigue.
    • The findings strongly implicate myoneural junction disease, characteristic of myasthenia gravis.

    Implications:

    • Sustained gaze fatigue serves as a potential early clinical diagnostic indicator for myasthenia gravis.
  • This observation can prompt earlier pharmacologic testing for definitive diagnosis and management.