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Comparison of the new rebound tonometer with Goldmann applanation tonometer in a clinical setting

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TLDR
The clinical usefulness of a new rebound tonometer, Icare® PRO (Icare PRO), by comparison with Goldmann applanation tonometry (GAT) in a study on patients with glaucoma is evaluated.
Abstract
. Purpose: To evaluate the clinical usefulness of a new rebound tonometer, Icare® PRO (Icare PRO), by comparison with Goldmann applanation tonometry (GAT) in a study on patients with glaucoma. Methods:  One hundred and seventy-two eyes of 86 subjects were enrolled in this study. All of the subjects were examined with an autorefractometer, Icare PRO, slit-lamp biomicroscope, GAT, ultrasound A-scan and pachymeter. Three intraocular pressure (IOP) measurements were obtained by Icare PRO and GAT. The intraobserver reliabilities were established by calculating the intraclass correlation coefficients. The Bland–Altman plot was used to compare the Icare PRO and GAT. Results:  There was a good correlation between the IOP measurement by GAT and that by Icare PRO (r = 0.6995, p < 0.001). The intraclass correlation coefficients of Icare PRO and GAT were 0.778 and 0.955, respectively. The IOP differences between Icare PRO and GAT (mean: 1.92 mmHg; SD: 3.29 mmHg; 95% limit of agreement: −4.52 to 8.37 mmHg) did not vary over the wide range of central corneal thickness (p = 0.498), age (p = 0.248), axial length (p = 0.277) or spherical equivalent (p = 0.075). Conclusions:  Although IOP with Icare PRO was higher than that with GAT, especially at lower GAT IOP value, Icare PRO was found to be a reliable method and showed a good correlation with GAT. The IOP difference between Icare PRO and GAT was not affected by the central corneal thickness, age, axial length or spherical equivalent. Icare PRO can be expected not only to be a good screening tool but also to be a good substitute for GAT.

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Citations
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Journal ArticleDOI

Comparison of three intraocular pressure measurement methods including biomechanical properties of the cornea.

TL;DR: It is shown that the RT Icare Pro ensures IOP measurements that are more comparable with the measurements obtained with the GAT than the measurements that is provided by UHS ST.
Journal ArticleDOI

The Icare HOME (TA022) Study: Performance of an Intraocular Pressure Measuring Device for Self-Tonometry by Glaucoma Patients

TL;DR: The Icare Home device is safe and reliable for self-tonometry, but nearly 1 in 6 individuals may fail to certify in use of the device based on large differences in IOP when comparing GAT with the Icare HOME measurements.
Journal ArticleDOI

Comparability of three intraocular pressure measurement: iCare pro rebound, non-contact and Goldmann applanation tonometry in different IOP group.

TL;DR: ICare pro shows a higher agreement with GAT over a wide range of IOP compared with NCT, however, NCT shows a greater overestimate of Iop in moderate and higher IOP group.
Journal ArticleDOI

Evaluation of a New Rebound Self-tonometer, Icare HOME: Comparison With Goldmann Applanation Tonometer.

TL;DR: The Icare HOME tonometer is feasible for use in self-monitoring of intraocular pressure and tends to overestimate IOP relative to GAT measurements, compared with a Goldmann applanation tonometer.
Journal ArticleDOI

Systematic Review of Current Devices for 24-h Intraocular Pressure Monitoring

TL;DR: This article is a systematic review of current and future technologies for measuring IOP over a 24-h period and falls into three main categories: self-monitoring, temporary continuous monitoring, and permanent continuous monitoring.
References
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Journal ArticleDOI

Measuring agreement in method comparison studies

TL;DR: The 95% limits of agreement, estimated by mean difference 1.96 standard deviation of the differences, provide an interval within which 95% of differences between measurements by the two methods are expected to lie.
Journal ArticleDOI

Twenty-four-hour intraocular pressure pattern associated with early glaucomatous changes.

TL;DR: The diurnal IOP is higher, the diurnal-to-nocturnal change of habitual Iop is less, and the posture-independent IOP pattern around normal awakening time is different in eyes with early glaucomatous changes.
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The influence of central corneal thickness and age on intraocular pressure measured by pneumotonometry, non-contact tonometry, the Tono-Pen XL, and Goldmann applanation tonometry

TL;DR: IOP measurement by all four methods is affected by CCT, with the NCT affected significantly more than the GAT, and subject age has a differential effect on the IOP measurements made by the Gat and OBF compared to the Tono-Pen.
Journal Article

Collagen fibrils in the human corneal stroma: structure and aging.

TL;DR: In this paper, the authors determined diameter, axial period, and lateral molecular spacing of collagen fibrils in human corneal stroma as a function of age, and they found that the fibril diameter was mostly due to an increased number of collagen molecules and, in addition, some expansion of the intermolecular Bragg spacing probably resulting from glycation-induced cross-linking.
Journal ArticleDOI

Comparison of dynamic contour tonometry with goldmann applanation tonometry.

TL;DR: IOP measurements by DCT are highly concordant with IOP readings obtained from GAT but do not vary in CCT and have a lower intra- and interobserver variability, which seems to be an appropriate method of tonometry for routine clinical use.
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