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Related Experiment Videos

Optic nerve elongation: does it exist?

A Alvi, I P Janecka, S Kapadia

    Skull Base Surgery
    |January 1, 1996
    PubMed
    Summary
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    Unilateral optic nerve elongation can indicate orbital and skull base neoplasms. This finding highlights the optic nerve

    Area of Science:

    • Ophthalmology
    • Neuroscience
    • Developmental Biology

    Background:

    • Optic nerve length reflects normal cranio-orbital development.
    • Unilateral optic nerve elongation is a rare finding.
    • Associated conditions include orbital and skull base neoplasms.

    Purpose of the Study:

    • To investigate the relationship between optic nerve elongation and neoplasms.
    • To discuss the embryology, anatomy, and physiology of the optic nerve.
    • To explore mechanisms of optic nerve stretch and repair.

    Main Methods:

    • Case study of two patients with unilateral optic nerve elongation.
    • Comparison of affected optic nerve length to contralateral normal optic nerve.
    • Review of embryological, anatomical, and physiological data.

    Related Experiment Videos

    Main Results:

    • Patient 1: 45 mm optic nerve elongation, light perception only.
    • Patient 2: 10 mm optic nerve elongation, preserved visual and extraocular function.
    • Optic nerve elongation correlated with orbital and skull base neoplasms.

    Conclusions:

    • Unilateral optic nerve elongation can be a sign of orbital and skull base neoplasms.
    • The degree of elongation may correlate with functional deficits.
    • Further research into optic nerve stretch and repair mechanisms is warranted.