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- W2087360278 abstract "Purpose: To compare the performance of dynamic contour tonometry (DCT) and Goldmann applanation tonometry (GAT) in measuring intraocular pressure in eyes with irregular corneas. Methods: GAT and DCT measures were taken in 30 keratoconus and 29 postkeratoplasty eyes of 35 patients after pachymetry and corneal topography. Regression and correlation analyses were performed between both tonometry methods and between tonometry methods and corneal parameters. Bland-Altman plots were constructed. Results: DCT values were significantly higher than GAT values in both study groups: +4.1 ± 2.3 mm Hg (mean ± SD) in keratoconus and +3.1 ± 2.5 mm Hg after keratoplasty. In contrast to DCT, GAT values were significantly higher in postkeratoplasty eyes than in keratoconus. The correlation between the 2 tonometry methods was moderate in keratoconus (Kendall correlation coefficient, τ = 0.34) as well in postkeratoplasty eyes (τ = 0.66). The ±1.96 SD span of the DCT-GAT differences showed a considerable range: −0.42 to +8.70 mm Hg in keratoconus and −1.87 to +7.98 mm Hg in postkeratoplasty eyes. In the keratoconus group, neither DCT nor GAT correlated significantly with any of the corneal parameters. In the postkeratoplasty group, both DCT and GAT measures showed a moderate positive correlation with corneal steepness, but only DCT had a significant negative correlation with the central corneal thickness (τ = −0.33). Conclusions: DCT measured significantly higher intraocular pressures than GAT in keratoconus and postkeratoplasty eyes. DCT and GAT measures varied considerably, and DCT was not less dependent on biomechanical properties of irregular corneas than GAT." @default.
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- W2087360278 date "2008-04-01" @default.
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- W2087360278 title "Dynamic Contour Tonometry in Keratoconus and Postkeratoplasty Eyes" @default.
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- W2087360278 doi "https://doi.org/10.1097/ico.0b013e31815dcf97" @default.
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