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Related Experiment Videos

Voluntary entropion.

J T Harvey

    Canadian Journal of Ophthalmology. Journal Canadien D'Ophtalmologie
    |February 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Voluntary entropion, a rare condition, was documented in a young girl. This suggests selective nerve control within the orbicularis oculi muscle may cause this eyelid malformation.

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    Area of Science:

    • Ophthalmology
    • Neurology

    Background:

    • Entropion is an eyelid condition where the eyelid margin rotates inward.
    • Voluntary entropion, specifically, is exceedingly rare, with only one prior documented case.

    Observation:

    • This study presents photographic documentation of voluntary entropion in a 12-year-old female patient.
    • Clinical examination revealed normal function of the lower-eyelid retractors and protractors.

    Findings:

    • The observed entropion is postulated to result from selective neural activation within the orbicularis oculi muscle complex.
    • Specifically, the preseptal portion of the muscle may exert greater influence than the pretarsal portion, leading to inward rotation.

    Implications:

    • This case deepens the understanding of eyelid muscle innervation and voluntary control.
  • It highlights a potential mechanism for rare eyelid abnormalities, offering insights for future clinical diagnosis and management.