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Optic Nerve Transection: A Model of Adult Neuron Apoptosis in the Central Nervous System
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Extraocular muscle insertion shift after disinsertion during strabismus surgery.

Worawalun Honglertnapakul1,2, Hilda Capo1, Kara M Cavuoto1

  • 1Bascom Palmer Eye Institute, University of Miami Miller School of Medicine , Miami, Florida.

Strabismus
|February 22, 2020
PubMed
Summary
This summary is machine-generated.

Rectus muscle surgery causes an anterior insertion shift. Factors like restricted eye movement and longer initial limbal-insertion distance (LID) increase this shift.

Keywords:
Limbal-insertion distanceinsertion shiftrectus muscle insertion

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Area of Science:

  • Ophthalmology
  • Surgical Research
  • Oculomotorics

Background:

  • Rectus muscle surgery is common for strabismus and other ocular conditions.
  • Understanding muscle behavior post-disinsertion is crucial for surgical outcomes.
  • Quantifying insertion shift aids in refining surgical techniques.

Purpose of the Study:

  • To quantify the insertion shift of rectus muscles after surgical disinsertion.
  • To identify preoperative and intraoperative factors influencing this shift.

Main Methods:

  • 110 patients undergoing rectus muscle surgery were analyzed.
  • Limbal-insertion distance (LID) was measured before and after muscle disinsertion.
  • Factors influencing insertion shift were statistically analyzed.

Main Results:

  • A significant anterior insertion shift of 1.0 mm was observed post-disinsertion.
  • Moderate to severe restriction on forced duction testing (FDT) correlated with larger shifts.
  • Longer preoperative LID was also associated with increased insertion shift.

Conclusions:

  • Rectus muscle disinsertion results in a consistent anterior shift.
  • Surgical planning should consider FDT findings and preoperative LID to anticipate potential shifts.