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Posterior Corneal Surface Changes After Pterygium Excision Surgery.

Eliya Levinger1,2, Nir Sorkin1,3, Sara Sella2,4

  • 1Department of Ophthalmology, Tel Aviv Medical Center, Tel-Aviv, Israel.

Cornea
|April 7, 2020
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Summary

Pterygium excision significantly impacts the posterior cornea, causing astigmatism. This effect is linked to patient age and pre-existing posterior astigmatism, not pterygium size.

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Area of Science:

  • Ophthalmology
  • Corneal Surgery
  • Biomedical Optics

Background:

  • Pterygium excision is a common surgical procedure.
  • The impact of pterygium excision on the posterior corneal surface is not fully understood.
  • Understanding these changes is crucial for optimizing surgical outcomes.

Purpose of the Study:

  • To evaluate the effect of pterygium excision on the posterior corneal surface.
  • To identify factors associated with changes in the posterior cornea after pterygium excision.

Main Methods:

  • Prospective interventional study of 33 eyes undergoing pterygium excision.
  • Utilized Galilei dual Scheimpflug analyzer for posterior corneal data.
  • Measured pterygium dimensions using high-resolution optical coherence tomography.

Main Results:

  • Pterygium excision induced significant posterior surgically induced astigmatism (SIA).
  • SIA correlated with age and preoperative posterior astigmatism.
  • Pterygium dimensions did not significantly associate with SIA magnitude.

Conclusions:

  • Pterygium excision causes significant posterior corneal astigmatism.
  • Age and preoperative posterior astigmatism are key factors influencing this astigmatic shift.
  • Pterygium size and depth do not predict the magnitude of induced astigmatism.