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Related Experiment Videos

Gray crescent in the optic nerve head

M B Shields

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

    A slate-gray crescent in the optic nerve head is common in black patients. Recognizing this normal optic nerve anatomy prevents misdiagnosis of glaucoma.

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    Area of Science:

    • Ophthalmology
    • Optic Nerve Anatomy

    Background:

    • The optic nerve head is a critical structure in the eye.
    • Variations in optic nerve head appearance can mimic pathology.

    Observation:

    • A slate-gray crescent was observed in the peripheral optic nerve head tissue.
    • This finding was present in 29 patients, predominantly those of black ethnicity.

    Findings:

    • The gray crescent was identified in 12% of 100 consecutive black patients.
    • These crescents were typically bilateral and located at the temporal or inferotemporal disk margin.

    Implications:

    • Accurate identification of the gray crescent is crucial.
    • Misinterpretation can lead to a misdiagnosis of optic disk cupping, a sign of glaucoma.