Influence of Corneal Thickness on Comparative Intraocular Pressure Measurements with Goldmann and Non-Contact Tonometers in Keratoconus

Silih, Mirna Stabuc; Hawlina, Marko

doi:10.1055/s-2003-812557

Cited by 17 publications

(3 citation statements)

References 18 publications

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“…Also, NCT provides an accurate and objective method of measuring IOP with many advantages over traditional Goldmann tonometry. 17 – 20 However, NCT values were significantly higher than GAT values in other studies 5 , 7 , 8 , 21 nGAT and fGAT values were correlated in our study, and these values were significantly lower than NCT values.…”

Section: Discussioncontrasting

confidence: 70%

“…In some studies, as in ours, no correlations were observed between corneal curvature, NCT, and GAT. 21 , 24 In the present study, there was also no correlation between nGAT and corneal curvature. No correlation was found between NCT and corneal curvature, whereas a negative correlation was found between GAT and corneal curvature.…”

Section: Discussioncontrasting

confidence: 58%

“… 23 , 24 However, no difference in GAT values was found in subjects with high corneal thickness and those with low corneal thickness. Stabuc Silih and Hawlina 21 also found no significant correlation between increased corneal thickness and GAT values. Nejabat et al 25 observed that NCT and GAT were correlated with CCT, although GAT values was lower than the NCT values.…”

Section: Discussionmentioning

confidence: 89%

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A comparison of NCT, Goldman application tonometry values with and without fluorescein

Erdoğan¹,

Akingol²,

Cam³

et al. 2018

OPTH

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PurposeThe aim of the study was to statistically compare intraocular pressure (IOP) values measured using noncontact tonometer (NCT), Goldmann applanation tonometry (GAT) with fluorescein (fGAT), and GAT without fluorescein (nGAT). The study was also performed to test whether the values obtained using each technique change in accordance with the central corneal thickness (CCT) and refractive and keratometric values.Study designThis study was a prospective study of 188 eyes of 94 healthy volunteers. Methods: IOP was measured using fGAT, nGAT and NCT. CCT, refractive values, and keratometric values were measured, and the correlations and differences in the IOP for each tonometer were investigated.ResultsThe mean IOP values obtained with the NCT, nGAT, and fGAT were 17.5±3.7, 12.3±2.7, and 12.5±2 mmHg. The mean CCT was 538.2±34.4 µm, the mean refractive value was 0.9±1.2 D, and the mean keratometric value was 43.5±1.5 D. NCT was positively correlated with fGAT and GAT values and was significantly higher than both the values. There were no differences between fGAT and GAT values. No correlation was observed between the CCT and keratometric and refractive values and the difference between NCT and nGAT or fGAT.ConclusionDifferences in the measurements obtained using nGAT and fGAT were insignificant (P>0.05). Both values were positively correlated with NCT measurements (r =0.354, P<0.05) and were independent of CCT, keratometry, and refraction values. nGAT appears to be suitable for use in routine clinic practice.

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Section: Discussioncontrasting

confidence: 70%

Section: Discussioncontrasting

confidence: 58%

Section: Discussionmentioning

confidence: 89%

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A comparison of NCT, Goldman application tonometry values with and without fluorescein

Erdoğan¹,

Akingol²,

Cam³

et al. 2018

OPTH

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Augeninnendruck und Hornhautdicke

Domke¹,

Hager²,

Wiegand³

2006

Ophthalmologe

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Independently of the large differences in individual pressure measurements between non-contact tonometry and applanation tonometry, we found higher IOP values with non-contact tonometry in thicker corneas as compared with applanation tonometry. In thinner corneas there was a better correspondence between both methods. Thus, it seems very likely that corneal rigidity increases with corneal thickness.

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Repeatability of intra-ocular pressure and central corneal thickness measurements provided by a non-contact method of tonometry and pachymetry

Schiano-Lomoriello

Lombardo

Tranchina

et al. 2010

Graefes Arch Clin Exp Ophthalmol

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Influence of Corneal Thickness on Comparative Intraocular Pressure Measurements with Goldmann and Non-Contact Tonometers in Keratoconus

Abstract: The thin cornea has more influence on the measurement with NCT than GAT. The relative precision of NCT compared with GAT seems to be influenced by the corneal thickness.

Cited by 17 publications

References 18 publications

A comparison of NCT, Goldman application tonometry values with and without fluorescein

A comparison of NCT, Goldman application tonometry values with and without fluorescein

Augeninnendruck und Hornhautdicke

Repeatability of intra-ocular pressure and central corneal thickness measurements provided by a non-contact method of tonometry and pachymetry

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