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Previous strabismus surgery and eye position under anesthesia.

P L Owens, E R Folk, F Chen

    Journal of Pediatric Ophthalmology and Strabismus
    |September 1, 1979
    PubMed
    Summary
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    General anesthesia causes eye divergence in strabismus patients, with prior surgery influencing the degree of divergence in each eye. This suggests mechanical factors impact eye alignment under anesthesia.

    Area of Science:

    • Ophthalmology
    • Anesthesiology
    • Strabismus Research

    Background:

    • Strabismus, including esotropia and exotropia, affects eye alignment.
    • General anesthesia can influence extraocular muscle tone and eye position.
    • Previous ocular surgery may alter the mechanical and anatomical characteristics of the eye.

    Purpose of the Study:

    • To investigate the effect of general anesthesia on eye position in patients with esotropia or exotropia.
    • To compare the changes in eye position under anesthesia between patients with no prior surgery and those with previous ocular surgery.

    Main Methods:

    • A study involving 51 strabismus patients divided into two groups: no previous surgery and previous surgery (symmetric or asymmetric).
    • Eye position was measured under general anesthesia and compared to the preoperative state.

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  • Analysis focused on the degree of eye divergence in each group and between eyes.

    • Main Results:

    • Both patient groups exhibited no change or increased eye divergence under general anesthesia compared to their preoperative status.
    • Patients with no prior surgery and those with symmetrical previous surgery showed equal divergence in both eyes.
    • Patients with asymmetric previous surgery displayed greater divergence in the operated eye compared to the unoperated eye.

    Conclusions:

    • General anesthesia can induce or increase eye divergence in strabismus patients.
    • The degree of divergence is influenced by the history of ocular surgery, highlighting the role of mechanical-anatomical factors.
    • Findings have implications for understanding eye alignment under anesthesia and surgical planning.