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Can we trust intraocular pressure measurements in eyes with intracameral air?

  • Glaucoma
  • Published:
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Abstract

Purpose

To evaluate the effect of intracameral air on intraocular pressure (IOP) measurements using Goldmann applanation tonometry (GAT) and applanation resonance tonometry (ART) in an in-vitro porcine eye model.

Methods

IOP was measured on thirteen freshly enucleated eyes at three reference pressures: 20, 30, and 40 mmHg. Six measurements/method were performed in a standardized order with GAT and ART respectively. Air was injected intracamerally in the same manner as during Descemet’s stripping endothelial keratoplasty (DSEK) and Descemet’s membrane endothelial keratoplasty (DMEK), and the measurements were repeated.

Results

Measured IOP increased significantly for both tonometry methods after air injection: 0.7 ± 2.1 mmHg for GAT and 10.6 ± 4.9 mmHg for ART. This difference was significant at each reference pressure for ART but not for GAT.

Conclusions

Although slightly affected, this study suggests that we can trust GAT IOP-measurements in eyes with intracameral air, such as after DSEK/DMEK operations. Ultrasound-based methods such as ART should not be used.

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Acknowledgments

The authors thank technical engineers Göran Mannberg and Kenji Claesson for valuable technical assistance and contribution. This study was supported by grants from the Kronprinsessan Margaretas Arbetsnämnd and the Insamlingsstiftelsen för medicinsk forskning at Umeå University

Conflicts of interest

The financial disclosures of the authors are the following: Gauti Jóhannesson – none; Christina Lindén – none; Anders Behndig – none; Anders Eklund – equity owner (CMTF Futv AB Sweden); Per Hallberg – equity owner (CMTF Futv AB Sweden). The sponsor or funding organization had no role in the design or conduct of this research.

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Authors and Affiliations

  1. Department of Clinical Science, Ophthalmology, Umeå University, Umeå, SE-901 85, Sweden

    Gauti Jóhannesson, Christina Lindén & Anders Behndig

  2. Department of Radiation Sciences, Biomedical Engineering, Umeå University, Umeå, SE-901 85, Sweden

    Anders Eklund & Per Hallberg

Authors
  1. Gauti Jóhannesson
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  2. Christina Lindén
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  3. Anders Eklund
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  4. Anders Behndig
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  5. Per Hallberg
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Correspondence to Gauti Jóhannesson.

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Jóhannesson, G., Lindén, C., Eklund, A. et al. Can we trust intraocular pressure measurements in eyes with intracameral air?. Graefes Arch Clin Exp Ophthalmol 252, 1607–1610 (2014). https://doi.org/10.1007/s00417-014-2720-5

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  • DOI: https://doi.org/10.1007/s00417-014-2720-5

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