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Central corneal thickness and Diaton transpalpebral tonometry

  • Glaucoma
  • Published:
Graefe's Archive for Clinical and Experimental Ophthalmology Aims and scope Submit manuscript

Abstract

Background

To examine the effects of central corneal thickness on the measures obtained from transpalpebral tonometry (Diaton), and to identify correlations between intraocular pressure (IOP) measurements with Diaton and the Goldmann applanation tonometer (GAT).

Methods

In this cross-sectional study, 162 eyes of 81 participants were included. Intraocular pressure measurements were obtained in all patients using Diaton and GAT. Central corneal thickness was determined by ultrasound pachymetry. The participants were stratified by corneal thickness: group I <530 μm (n = 56), group II 530–560 μm (n = 65), and group III >560 μm (n = 41).

Results

There were moderate correlations between IOP readings obtained using the Diaton and corrected GAT (C-GAT) (r = 0.303; P < 0.0001), and between corrected Diaton (C-Diaton), and C-GAT (r = 0.399; P < 0.0001). The mean Diaton tonometer readings were lower than C-GAT measurements (Diaton-corrected GAT mean difference, 0.9 ± 3.8 mmHg; c-Diaton-corrected GAT mean difference, 0.7 ± 3.5 mmHg). Differences were detected between the groups of patients for the GAT values [2.4 ± 3.6 mmHg for those with the thinnest corneas (<530 μm), 0.7 ± 3.6 mmHg for those with moderate corneas (between 531 μm and 560 μm), and −0.6 ± 3.6 mmHg for those with the thickest (>560 μm) corneas], whereas a significantly lower difference (0.9 ± 3.8 mmHg) was noted for the Diaton values of all individuals.

Conclusions

The Diaton measurements show moderate correlation with those provided by applanation tonometry. The Diaton tonometer seems to be more affected by the corneal thickness, especially in the thinnest corneas.

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Acknowledgement

This study were not financed by any sponsor.

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Authors and Affiliations

  1. Department of Ophthalmology, Cumhuriyet University School of Medicine, 58140, Sivas, Turkey

    Mustafa Ilker Toker, Ayse Vural, Haydar Erdogan, Aysen Topalkara & Mustafa Kemal Arici

  2. Cumhuriyet Universitesi Tip Fakultesi Goz Hastaliklari A.D., 58140, Sivas, Turkey

    Mustafa Ilker Toker

Authors
  1. Mustafa Ilker Toker
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  2. Ayse Vural
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  3. Haydar Erdogan
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  4. Aysen Topalkara
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  5. Mustafa Kemal Arici
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Correspondence to Mustafa Ilker Toker.

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Toker, M.I., Vural, A., Erdogan, H. et al. Central corneal thickness and Diaton transpalpebral tonometry. Graefes Arch Clin Exp Ophthalmol 246, 881–889 (2008). https://doi.org/10.1007/s00417-008-0769-8

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  • DOI: https://doi.org/10.1007/s00417-008-0769-8

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