Einfluss der Hornhautdicke bei Keratokonus auf die Messung des Augeninnendrucks mit 4 verschiedenen Messverfahren

Klamann, Matthias K. J.; Maier, Anna-Karina B.; Gonnermann, Johannes; Ruokonen, P.; Bertelmann, Eckart; Torun, Necip

doi:10.1055/s-0032-1328408

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…We found that the mean IOP obtained by ICare was significantly lower than those by GAT and Tono-Pen; this is in accordance with results of previous studies [27–29]. The difference was approximately 2 mmHg, and so, the statistically significant differences found between GAT and ICare were not considered clinically relevant [27]. We consider the change in corneal rigidity after MyoRing implantation is a possible reason; however, the ICare tonometer was found to be lower.…”

Section: Discussionsupporting

confidence: 93%

“…In our study, there was no significant correlation between CCT and the mean difference in IOP measurement by different methods. This was the case in the study by Klamann et al, in which they evaluated the effect of CCT of keratoconic corneas on IOP measurements as measured by four different techniques, and they found that ICare and GAT were found to be independent of CCT in keratoconic corneas [27]. This similarity between our results and theirs may be because both studies investigated keratoconus cases.…”

Section: Discussionsupporting

confidence: 86%

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Comparison of IOP Measurement by Goldmann Applanation Tonometer, ICare Rebound Tonometer, and Tono-Pen in Keratoconus Patients after MyoRing Implantation

Rateb

Abdel-Radi

Eldaly

et al. 2019

Journal of Ophthalmology

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Purpose. To evaluate the different IOP readings by Goldmann applanation tonometer (GAT), ICare rebound tonometer, and Tono-Pen in keratoconus patients after MyoRing implantation. To assess the influence of central corneal thickness (CCT) and thinnest corneal location (TCL) on IOP measurements by different tonometers. Setting. Prospective observational study was conducted in two private centers in Egypt from February 2015 to November 2016. Methods. Seventeen eyes of 10 patients suffering from keratoconus and who underwent MyoRing implantation were recruited. All subjects underwent GAT, ICare, and Tono-Pen IOP measurements in random order. Central corneal thickness and thinnest corneal location were assessed by Pentacam. Difference in mean in IOP readings was assessed by T-test. Correlation between each pair of devices was evaluated by Pearson correlation coefficient. The Bland–Altman analysis was used to assess intertonometer agreement. Results. Seventeen eyes (10 patients) were evaluated. The mean IOP reading was 13.9 ± 3.68, 12.41 ± 2.87, and 14.29 ± 1.31 mmHg in GAT, ICare, and Tono-Pen group, respectively. There was a significant difference between IOP readings by GAT/ICare and Tono-Pen/ICare (p value: 0.032 and 0.002, respectively) with no significant difference between GAT/Tono-Pen (p value: 0.554). Mean difference in IOP measurements between GAT/ICare was 1.49 ± 2.61 mmHg, Tono-Pen/ICare was 1.89 ± 2.15 mmHg, and GAT/Tono-Pen was −0.39 ± 2.59 mmHg. There was no significant correlation between the difference in IOP readings among any pair of devices and CCC or TCL. The Bland–Altman analysis showed a reasonable agreement between any pair of tonometers.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 86%

Comparison of IOP Measurement by Goldmann Applanation Tonometer, ICare Rebound Tonometer, and Tono-Pen in Keratoconus Patients after MyoRing Implantation

Rateb

Abdel-Radi

Eldaly

et al. 2019

Journal of Ophthalmology

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“…Conversely to RT, there are many studies investigating DCT measurements in keratoconic corneas. These studies are summarized in Table 4 19, 20, 21, 22, 23, 24, 25, 26. DCT measurements about 4 mm Hg high than GAT measurements in keratoconic corneas shown in Table 4.…”

Section: Discussionmentioning

confidence: 95%

Evaluation of Goldmann applanation tonometry, rebound tonometry and dynamic contour tonometry in keratoconus

Özçura

Yıldırım

Tambova

et al. 2017

Journal of Optometry

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PurposeTo compare the intraocular pressure (IOP) measurements obtained with the rebound tonometry (RT), dynamic contour tonometry (DCT) and Goldmann applanation tonometry (GAT) in keratoconic corneas and to investigate the effects of central corneal thickness (CCT) and corneal radius of curvature (CR) on IOP measurements.MethodsSixty-three eyes of 63 keratoconus patients were enrolled in this cross-sectional study. IOP was measured on each subject always in the same order, ICare RT-Pascal DCT-GAT, after a minimum interval of 10 min between measurements. CCT and CR were measured using a rotating Scheimpflug camera before the IOP measurements in all subjects. One way repeated measures ANOVA and Pearson correlation coefficient analysis was used for the statistical assessment.ResultsMean IOP for all enrolled eyes was 11.72 ± 2.59 mm Hg for GAT, 9.34 ± 3.29 mm Hg for RT, and 15.42 ± 3.31 mm Hg for DCT. There were statistically significant differences among the three tonometers; GAT and RT (P < 0.001), GAT and DCT (P < 0.001), and RT and DCT (P < 0.001). GAT and RT were significantly positively correlated with CCT (r = 0.288, P = 0.025 and r = 0.483, P < 0.001, respectively). RT was also significantly positively correlated with CR (r = 0.550, P < 0.001). DCT was not significantly correlated with CCT (r = 0.115, P = 0.377) nor CR (r = −0.179, P = 0.168).ConclusionsDCT has overestimated but RT has underestimated IOP readings according to GAT measurements in keratoconic corneas. DCT may be the most appropriate tonometer to use in keratoconus for the measurements of IOP, because DCT do not appear to be dependent upon CCT and CR.

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Comparison of Diaton transpalpebral tonometer with applanation tonometry in keratoconus

Wisse

Peeters

et al. 2016

Int J Ophthalmol

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Einfluss der Hornhautdicke bei Keratokonus auf die Messung des Augeninnendrucks mit 4 verschiedenen Messverfahren

Abstract: IOPen seemed to be affected by CCT. IOP readings by iCare, GAT and DCT were found to be independent of CCT in keratoconic corneas.

Cited by 3 publications

References 12 publications

Comparison of IOP Measurement by Goldmann Applanation Tonometer, ICare Rebound Tonometer, and Tono-Pen in Keratoconus Patients after MyoRing Implantation

Comparison of IOP Measurement by Goldmann Applanation Tonometer, ICare Rebound Tonometer, and Tono-Pen in Keratoconus Patients after MyoRing Implantation

Evaluation of Goldmann applanation tonometry, rebound tonometry and dynamic contour tonometry in keratoconus

Comparison of Diaton transpalpebral tonometer with applanation tonometry in keratoconus

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