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Related Experiment Videos

Intraocular pressure measurement after hyperopic LASIK.

Xiaohong Wang1, Joanne Shen, James P McCulley

  • 1Department of Ophthalmology, The University of Texas Southwestern Medical Center at Dallas, 75390-9057, USA.

The CLAO Journal : Official Publication of the Contact Lens Association of Ophthalmologists, Inc
|July 30, 2002
PubMed
Summary

Goldmann applanation tonometry (GAT) may underestimate intraocular pressure (IOP) after hyperopic LASIK. Pneumotonometry (PT) offers a more reliable IOP measurement post-hyperopic LASIK surgery.

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Area of Science:

  • Ophthalmology
  • Corneal Surgery
  • Glaucoma Diagnostics

Background:

  • Goldmann applanation tonometry (GAT) is a standard method for measuring intraocular pressure (IOP).
  • Previous research indicates GAT underestimates IOP after myopic refractive surgeries.
  • The impact of hyperopic LASIK on GAT accuracy requires further investigation.

Purpose of the Study:

  • To assess the reliability of Goldmann applanation tonometry (GAT) for intraocular pressure (IOP) measurement after hyperopic LASIK.
  • To compare IOP measurements obtained by GAT and pneumotonometry (PT) following hyperopic LASIK.

Main Methods:

  • Prospective evaluation of 20 eyes from 15 patients who underwent hyperopic LASIK.
  • Measurement of central and peripheral IOP using GAT and PT.

Related Experiment Videos

  • Measurement of central and peripheral corneal thickness via ultrasonographic pachymetry.
  • Preoperative and 12-month postoperative assessments.

    • Main Results:

    • Postoperative GAT measurements were significantly lower than preoperative central IOP (P <0.001).
    • Postoperative PT measurements showed a non-significant decrease compared to preoperative central IOP.
    • No significant differences were found between central and peripheral IOP measurements with either GAT or PT.

    Conclusions:

    • Goldmann applanation tonometry (GAT) may underestimate intraocular pressure (IOP) following hyperopic LASIK.
    • Pneumotonometry (PT) may provide a more reliable IOP measurement in the post-hyperopic LASIK period.