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Related Experiment Videos

Goldmann applanation tonometry after intacs corneal ring segments(1).

J Ruckhofer1, E J Linebarger, D J Schanzlin

  • 1Shiley Eye Center, University of California, San Diego, California, USA. j.ruckhofer@lks.at

Journal of Cataract and Refractive Surgery
|October 6, 2000
PubMed
Summary

Intacs corneal ring implantation slightly reduced intraocular pressure (IOP) measurements, as measured by Goldmann applanation tonometry. These IOP changes were not clinically significant and did not correlate with patient age or corneal characteristics.

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Area of Science:

  • Ophthalmology
  • Corneal Surgery
  • Glaucoma Research

Background:

  • Intacs (KeraVision) are corneal ring segments used to reshape the cornea.
  • Intraocular pressure (IOP) is a critical factor in managing ocular health, particularly in glaucoma.
  • Understanding the effect of corneal implants on IOP is essential for patient care.

Purpose of the Study:

  • To evaluate changes in intraocular pressure (IOP) following Intacs corneal ring implantation.
  • To assess the accuracy of Goldmann applanation tonometry (GAT) in measuring IOP after Intacs placement.

Main Methods:

  • A multicenter, phase III clinical trial with 359 participants.
  • One-year follow-up data analyzing IOP measured by GAT preoperatively and at multiple postoperative intervals.

Related Experiment Videos

  • Comparison of IOP changes between Intacs-treated eyes and untreated fellow eyes (controls).

    • Main Results:

    • Mean IOP in Intacs-treated eyes was significantly lower postoperatively compared to baseline.
    • No significant correlation was found between IOP changes and patient age, keratometry, or corneal thickness.
    • Mean IOP was significantly lower in Intacs eyes than in control eyes at 1, 3, and 6 months post-implantation.

    Conclusions:

    • Intacs implantation resulted in a slight reduction in IOP measurements obtained by GAT.
    • Postoperative IOP differences between treated and control eyes were statistically significant but not clinically meaningful.
    • Goldmann applanation tonometry remains an accurate method for IOP measurement in eyes with Intacs corneal implants.