Transpalpebral measurement of intraocular pressure using the Diaton tonometer versus standard Goldmann applanation tonometry

@article{Li2009TranspalpebralMO,
  title={Transpalpebral measurement of intraocular pressure using the Diaton tonometer versus standard Goldmann applanation tonometry},
  author={Yuehua Li and Jingming Shi and Xuanchu Duan and Fang Fan},
  journal={Graefe's Archive for Clinical and Experimental Ophthalmology},
  year={2009},
  volume={248},
  pages={1765-1770}
}
BackgroundDiaton transpalpebral tonometry is a new version of TGDc-01 transpalpebral tonometry. The aim of this study is to evaluate the reliability of this method, and to compare the results with those of corrected Goldmann applanation tonometry (c-GAT), which is the “gold standard” for the clinical measurement of IOP.MethodsIOP was measured in 212 eyes of 129 subjects by means of two different methods. Measurements with two tonometers were performed in random order, and the measurements of… 

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TLDR
The TGDc-01 is not a reliable tool for IOP measurement in clinical routine because the IOP values obtained are generally lower and less accurate than those obtained with the Goldmann tonometer.

Deviations between transpalpebral tonometry using TGDc-01 and Goldmann applanation tonometry depending on the IOP level

TLDR
TGDc-01–based tonometry demonstrated an increasing underestimation of IOP with increasing IOP levels when compared with the current standard method of Goldmann applanation tonometry.

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TLDR
TGDc-01 could not be established as a substitute or diagnostic alternative method for Goldmann applanation tonometry, but as deviations between TGDc01 and goldmann turned out smaller than between palpation of IOP and Goldmann, TGDC-01 seems to provide a better choice for tonometry in patients.

Measurement of the intraocular pressure with the “transpalpebral tonometer” TGDc-01 in comparison with applanation tonometry

TLDR
The eyelid tonometer may be helpful as a screening tool when Goldmann applanation tonometry is not applicable, but in more than 10% of the measurements the IOP readings differed by more than 3 mmHg.

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

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TLDR
It is concluded that the central corneal thickness is a parameter which should be taken into consideration when evaluating applanation tonometer readings.

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TLDR
Central corneal thickness significantly affects IOP reading obtained by applanation tonometry according to the Goldmann principle, and a correction of IOP readings by considering CCT according toThe Dresdner correction table might be helpful for determining an accurate IOP value.