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Pupillary dysfunction in myasthenia gravis.

F E Lepore, G E Sanborn, J T Slevin

    Annals of Neurology
    |July 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

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    Pupil constriction-dilation cycles are prolonged in patients with myasthenia gravis, indicating potential effects beyond striated muscle. This finding may suggest autonomic or central nervous system involvement in myasthenia gravis.

    Area of Science:

    • Ophthalmology
    • Neurology
    • Autonomic Nervous System

    Background:

    • Myasthenia gravis is primarily known for affecting the neuromuscular junction of striated muscles.
    • Pupillary light reflex involves both autonomic and central nervous system pathways.

    Purpose of the Study:

    • To investigate pupillary light reflex dynamics in myasthenia gravis patients.
    • To explore potential autonomic or central nervous system involvement in myasthenia gravis.

    Main Methods:

    • Pupil constriction-dilation cycles were measured using a slit-lamp beam.
    • Comparison between myasthenia gravis patients, normal controls, and patients on steroids for nonneurological conditions.

    Main Results:

    • Significantly prolonged pupillary constriction-dilation cycle times were observed in myasthenia gravis patients.

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  • A correlation was found between the duration of myasthenia gravis and the slowing of pupillary cycle time.

    • Conclusions:

    • Myasthenia gravis may impact ectodermally derived smooth muscle or autonomic neuromuscular junctions.
    • Prolonged pupillary cycles could indicate central pathway dysfunction in the pupillary light reflex.