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Where is the gray line?

A E Wulc, R M Dryden, T Khatchaturian

    Archives of Ophthalmology (Chicago, Ill. : 1960)
    |August 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

    The gray line, a surgical landmark for eyelid repair, is histologically identified as the superficial portion of the orbicularis muscle, specifically the muscle of Riolan. This study reveals its deep anatomic counterpart for the first time.

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    Area of Science:

    • Ophthalmology
    • Anatomy
    • Surgical Pathology

    Background:

    • The gray line is a recognized surface landmark for eyelid margin laceration repair.
    • Its deep or superficial anatomic basis has not been previously described.

    Purpose of the Study:

    • To histologically identify the deep anatomic structure corresponding to the gray line.
    • To understand the gray line's relationship with eyelid musculature.

    Main Methods:

    • Histological examination of 51 eyelid resections.
    • Localization of the gray line on the surface prior to resection.

    Main Results:

    • The gray line consistently corresponds to the most superficial part of the orbicularis oculi muscle.

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  • This superficial portion is identified as the muscle of Riolan.
  • Morphological changes with lid movement were observed.

    • Conclusions:

    • The gray line represents the muscle of Riolan, providing a deep anatomic correlate.
    • This finding enhances understanding of eyelid anatomy for surgical repair.
    • A hypothesis for the gray color is proposed.