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Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
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Myopic shift after Salzmann nodule excision.

Emily M Witsberger1, Leo J Maguire, Sanjay V Patel

  • 1From the Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota.

Journal of Cataract and Refractive Surgery
|June 10, 2021
PubMed
Summary
This summary is machine-generated.

Salzmann nodule excision causes a myopic shift and corneal steepening in most eyes, impacting refractive error. Patients should be informed of potential refractive changes and advised to defer cataract surgery until stability is achieved.

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Area of Science:

  • Ophthalmology
  • Corneal Surgery
  • Refractive Error

Background:

  • Salzmann nodule excision is a surgical procedure to remove corneal opacities.
  • Understanding the refractive outcomes post-excision is crucial for patient management.

Purpose of the Study:

  • To quantify changes in manifest refractive error and mean keratometric power (Km) after Salzmann nodule excision.
  • To assess refractive changes at 1 month and ≥12 months post-surgery.

Main Methods:

  • Retrospective case series of 73 eyes from 58 patients undergoing Salzmann nodule excision.
  • Comparison of preoperative and postoperative manifest refractive error (spherical equivalent), Km, and corrected distance visual acuity (CDVA).
  • Exclusion of eyes with ocular comorbidities; generalized estimating equation models used for analysis.

Main Results:

  • A significant myopic shift occurred at 1 month post-excision (-1.10 D, P < .001), with 65% of eyes experiencing ≥0.5 D shift.
  • Mean keratometric power (Km) increased significantly at 1 month (44.2 D, P < .001), indicating corneal steepening.
  • Corrected distance visual acuity (CDVA) improved significantly at 1 month (0.05 logMAR, P < .001).

Conclusions:

  • Salzmann nodule excision is associated with a myopic shift and corneal steepening.
  • Patients require counseling regarding potential refractive changes after the procedure.
  • Deferral of cataract surgery until refractive stability is achieved is recommended.