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Related Experiment Videos

Corneal topographic changes after extraocular muscle surgery.

D P Hainsworth1, J R Bierly, E T Schmeisser

  • 1Mason Eye Institute, University of Missouri-Columbia, 65212, USA.

Journal of AAPOS : the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
|April 30, 1999
PubMed
Summary

Strabismus surgery significantly alters corneal topography. Changes in extraocular muscle tension impact the entire cornea, not just adjacent areas, highlighting corneal interdependence.

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Area of Science:

  • Ophthalmology
  • Corneal topography
  • Surgical outcomes

Background:

  • Refractive error changes are noted post-strabismus surgery.
  • Extraocular muscle tension is a suspected mechanism for corneal alteration.

Purpose of the Study:

  • Investigate corneal topographic changes following strabismus surgery in humans.
  • Evaluate the impact of extraocular muscle manipulation on corneal topography.

Main Methods:

  • Corneal topography was measured pre- and post-operatively in 63 eyes from 43 patients.
  • Optic nerve sheath fenestration (ONSF) surgery served as a control, involving medial rectus muscle manipulation.
  • Central and peripheral corneal power was assessed across 8 meridians.

Main Results:

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  • All surgical groups exhibited significant changes in corneal power from pre- to post-operation (P < .01).
  • Significant differences were observed across grouped procedures, with notable exceptions between resection vs. ONSF and resection vs. recession.

Conclusions:

  • Altering extraocular muscle tension significantly affects the entire corneal surface.
  • This demonstrates a high degree of interaction and interdependence among corneal positions.