Intraocular Pressure Measurements Using Dynamic Contour Tonometry after Laser In Situ Keratomileusis

Kaufmann, C.; Bachmann, Lucas M.; Thiel, Michael

doi:10.1167/iovs.02-0946

Cited by 194 publications

(153 citation statements)

References 35 publications

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“…Several studies showed a significantly lower correlation of CCT with DCT than with GAT. 16,[28][29][30][31] Correspondingly, the present study indicated that DCT readings were statistically independent of CCT, CC, AL, or age. On the contrary, IOP values obtained by GAT depended on CCT but were not significantly influenced by other ocular structural factors and age.…”

Section: Discussionsupporting

confidence: 51%

“…Similar results, in spite of different mean values, have been reported by previous investigations. 16,[19][20][21][23][24][25][26][27][28][29][30][31]35,36 The DIOP between DCT and GAT readings was higher in healthy than in glaucomatous eyes, either with open-angle or angleclosure phenotypes (Table 1). The same outcome has been found by analysing IOP measurements obtained by DCT and GAT in different groups of subjects with the same CCT value, except for POAG subjects with thinner corneas.…”

Section: Discussionmentioning

confidence: 99%

“…17 Some recent studies compared the performance of the new device against other tonometers [18][19][20][21][22] considering either the influence of pachymetry on IOP readings [23][24][25][26] or the impact of refractive surgery as a source of errors in applanation tonometry. [27][28][29][30] Only two studies evaluated ocular structural factors other than pachymetry influencing IOP measurements in healthy subjects 31 or African American subjects. 32 In this study, we compared the IOP readings obtained by DCT with those of GAT and analysed the influence of ocular structural factors (CCT, CC, AL) and age on IOP readings in a large group of Caucasian healthy subjects, patients with primary open angle glaucoma (POAG), and patients with primary angle-closure glaucoma (PACG).…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Goldmann applanation tonometry and dynamic contour tonometry in healthy and glaucomatous eyes

Ceruti

Morbio

Marraffa

et al. 2008

Eye

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Purpose To compare the measurements of intraocular pressure (IOP) with dynamic contour tonometry (DCT) and Goldmann applanation tonometry (GAT) in healthy and glaucomatous eyes and to evaluate the influence of corneal thickness (CCT), corneal curvature (CC), axial length (AL), and age on these tonometric alternatives. Methods Three hundred eyes of 100 healthy subjects, 100 patients with primary open angle glaucoma, and 100 patients with primary angle-closure glaucoma underwent IOP evaluation with DCT and GAT, and measurements of CCT, CC, and AL. Bland-Altman plots were used to evaluate the agreement between tonometers. Regression analysis was used to evaluate the influence of ocular structural factors on IOP measurements obtained with both tonometers. Results Bland-Altman plots indicated that the 95% limits of agreement between tonometers were À1.4 to 6.6 mmHg. DCT values measured 2.6 ± 1.9 mmHg higher than GAT readings (Po0.001). The mean IOP difference between DCT and GAT (DIOP) was higher in healthy than in glaucomatous eyes and the magnitude of difference increased with increasing CCT. A significant reduction of DIOP with an increase in both CCT (Po0.001) and IOP values (Po0.001) was found. Regression analysis showed no effect of CC, AL, and age on both DCT and GAT readings. In contrast to GAT (Po0.001), DCT measurements were not influenced by CCT (P ¼ 0.43).Conclusions IOP readings obtained by DCT were higher and less affected by CCT than those by GAT. The DIOP was higher in healthy than in glaucomatous eyes and decreased in relation to increased CCT and IOP values.

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Section: Discussionsupporting

confidence: 51%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of Goldmann applanation tonometry and dynamic contour tonometry in healthy and glaucomatous eyes

Ceruti

Morbio

Marraffa

et al. 2008

Eye

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“…21,24,25 Kaufmann et al 21 compared IOP measurements using GAT and DCT preoperatively and 2 weeks after LASIK in 25 patients and highlighted a significant decrease in GAT-measured IOP postoperatively but no significant change in DCT measured IOP. However, this study was unmasked, limited by the small sample size, and no analysis of agreement between the instruments was attempted.…”

Section: Discussionmentioning

confidence: 99%

“…A recent study comparing dynamic contour tonometry (DCT) and GAT, before and after myopic LASIK correction noted no significant change in DCTmeasured IOP while the GAT-measured IOP decreased significantly. 21 The purpose of the current study was to compare masked IOP measurements obtained by PDCT and GAT and to correlate them with CCT, in a group of patients with normal corneas.…”

Section: Introductionmentioning

confidence: 99%

Comparison of intraocular pressure measured by Pascal dynamic contour tonometry and Goldmann applanation tonometry

Danesh‐Meyer

Craig

et al. 2005

Eye

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Aims To compare the intraocular pressure (IOP) measurements obtained using the Pascal dynamic contour tonometer (PDCT) with the standard Goldmann applanation tonometer (GAT) and to correlate these with central corneal thickness (CCT) in patients with normal corneas. Methods A prospective, masked, comparative case series of 116 eyes from patients attending a glaucoma clinic. IOP was measured with PDCT by one examiner and with GAT by a masked, independent examiner. A mean of six CCT readings was used for analysis. Results IOP measured by the two instruments correlated significantly (r ¼ 0.77; Po0.0001). IOP measured by GAT correlated strongly with CCT (r ¼ 0.37, P ¼ 0.0001) whereas the relationship between IOP measured by PDCT and CCT approached significance (r ¼ 0.17, P ¼ 0.073). The differences between GAT and PDCT measured IOP also correlated strongly with CCT (r ¼ 0.37, Po0.0001). The 95% limits of agreement between GAT and PDCT were 74.2 mmHg. Dividing the eyes into three groups on the basis of CCT, demonstrated those in the thickest tertile showed a poorer agreement between instruments and the GAT measured significantly higher IOP in this group (P ¼ 0.003) while the PDCT showed no significant differences with different CCTs (P ¼ 0.37). Conclusion Demonstration of the relative independence of PDCT IOP measurements from CCT supports a potential clinical role for this instrument, particularly for subjects with CCT outside the normal range.

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Clinical Comparison of Contour and Applanation Tonometry and Their Relationship to Pachymetry

Kniestedt¹

2005

Arch Ophthalmol

104

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Intraocular Pressure Measurements Using Dynamic Contour Tonometry after Laser In Situ Keratomileusis

Abstract: Significant decreases in IOP were recorded by GAT after LASIK for myopia. Measurements by DCT, however, did not reveal any significant changes in IOP.

Cited by 194 publications

References 35 publications

Comparison of Goldmann applanation tonometry and dynamic contour tonometry in healthy and glaucomatous eyes

Comparison of Goldmann applanation tonometry and dynamic contour tonometry in healthy and glaucomatous eyes

Comparison of intraocular pressure measured by Pascal dynamic contour tonometry and Goldmann applanation tonometry

Clinical Comparison of Contour and Applanation Tonometry and Their Relationship to Pachymetry

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