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Related Experiment Video

Updated: Apr 10, 2026

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[Rebound tonometry after vitreoretinal surgery].

A Rosentreter1,2, R Hoerster3, T Schick3

  • 1Zentrum für Augenheilkunde, Universität zu Köln, Köln, Deutschland. andre.rosentreter@googlemail.com.

Der Ophthalmologe : Zeitschrift Der Deutschen Ophthalmologischen Gesellschaft
|June 14, 2015
PubMed
Summary

The Icare rebound tonometer (RT) offers accurate intraocular pressure (IOP) measurements post-vitreoretinal surgery, serving as a reliable alternative to Goldmann applanation tonometry (GAT). Schiötz indentation tonometry (SIT) showed divergence, likely due to underestimation.

Keywords:
EndotamponadeGoldmann applanation tonometryIntraocular pressurePars plana vitrectomySchiötz indentation tonometry

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Area of Science:

  • Ophthalmology
  • Glaucoma Research
  • Surgical Outcomes

Background:

  • Accurate intraocular pressure (IOP) monitoring is crucial after pars plana vitrectomy (PPV).
  • Traditional tonometry methods may face challenges in the post-surgical setting.
  • Comparing different tonometers is essential for clinical practice optimization.

Purpose of the Study:

  • To evaluate the practicability and comparability of the Icare rebound tonometer (RT) against the Schiötz indentation tonometer (SIT) and Goldmann applanation tonometer (GAT).
  • To assess IOP measurement accuracy in patients following pars plana vitrectomy (PPV).

Main Methods:

  • Prospective analysis of 100 eyes from patients undergoing vitreoretinal surgery.
  • IOP measurements taken using RT (preoperative, day of surgery, 2 days post-op), SIT (day of surgery), and GAT (preoperative, 2 days post-op).
  • Subgroup analysis based on endotamponade and IOP levels.

Main Results:

  • Mean preoperative IOP: RT 15.4±8.0 mmHg, GAT 16.1±7.9 mmHg.
  • Bland-Altman analysis showed minimal bias (-0.6 mmHg) between RT and GAT.
  • Postoperative bias between RT and SIT was 3.0 mmHg on surgery day; no significant bias between RT and GAT.

Conclusions:

  • Rebound tonometry (RT) provides precise IOP measurements after vitreoretinal surgery.
  • Schiötz indentation tonometry (SIT) may underestimate IOP post-surgery.
  • RT is a viable clinical alternative to GAT for IOP assessment in patients after PPV.