Clinical evaluation of the Canon TX-10 noncontact tonometer in healthy eyes

García-Resúa, Carlos; Fernández, María Jesús Giráldez; Yebra‐Pimentel, Eva; García-Montero, Silvia

doi:10.1177/112067211002000326

Cited by 19 publications

(24 citation statements)

References 41 publications

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“…Clinical agreement between the noncontact tonometer and the GAT has been demonstrated in previous studies of normotensive subjects,5,6,29,30 with a propensity for the noncontact tonometer to return about 3 mmHg higher IOP measurements than the GAT7,8,27,28 in subjects with IOPs up to 21 mmHg.…”

Section: Discussionsupporting

confidence: 59%

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Performance of the PT100 noncontact tonometer in healthy eyes

Almubrad¹

2011

OPTH

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Background:The purpose of this study was to assess the repeatability and reproducibility of the PT100 noncontact tonometer and to compare its consistency with the Goldmann applanation tonometer (GAT) in measuring intraocular pressure (IOP).Methods:Triplicate IOP measurements were obtained on two separate occasions using the PT100 and GAT from randomly selected eyes in 66 healthy volunteers aged 22 ± 1 years. The repeatability and reproducibility of each techniques was assessed. Agreement between the techniques was statistically quantified using intrasession repeatability for each technique as the basis for comparison.Results:Both techniques returned equal IOP values in the first measurement session (15 ± 3 mmHg). The second session showed a mean difference in average IOP (1 ± 0.71). The 95% limits of agreement between the techniques were −5.2 to 5.5 mmHg and −4.0 to 4.7 mmHg (sessions 1 and 2, respectively). These mean differences were not statistically significant (P > 0.05, paired t-test), with the PT100 underestimating IOP measurement by 1.00 mmHg. The mean intrasession IOP for GAT sessions 1 and 2 was 0 ± 0.90 mmHg and 0.04 ± 1.06 mmHg, respectively, and the corresponding mean IOP measurement difference for the PT100 was −0.06 ± 0.96 and −0.39 ± 0.94 mmHg (sessions 1 and 2, respectively; P > 0.05, paired t-test). Repeatability coefficients for the GAT IOP measurements were 1.8 mmHg and 2.1 mmHg for sessions 1 and 2, while the PT100 repeatability coefficient was 1.9 mmHg and 1.8 mmHg for sessions 1 and 2, respectively. The intrasession repeatability coefficient of both techniques for test–retest differences were within ±5 mmHg.Conclusion:The PT100 noncontact tonometer produced greater repeatability than the GAT in assessment of IOP, whereas GAT resulted in more reproducible results. Both techniques showed a close level of agreement on comparison, with the PT100 underestimating IOP measurement by 1.0 mmHg only, although this was not clinically or statistically significant. Of importance is that the IOP measurements using these techniques could be interchangeable in the IOP range studied here.

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Section: Discussionsupporting

confidence: 59%

“…Overall, both instruments showed good repeatability, with the PT100 noncontact tonometer being more consistent in repeated measurement sessions. Two other studies5,6 have also shown similar repeatability coefficients for the GAT, ±2.5 mmHg 5 and 3.70 mmHg 6 when compared with other noncontact tonometers 5,6…”

Section: Discussionsupporting

confidence: 56%

Performance of the PT100 noncontact tonometer in healthy eyes

Almubrad¹

2011

OPTH

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“…Studies on normal eyes have demonstrated CoR values ranging from 2.2 mmHg to 9.2 mmHg and 95% limits of agreement ranging from −7.6 mmHg to +14.2 mmHg between various NCTs and GAT [10,[18][19][20][21][22][23]. In general, NCTs tended to over-read the GAT IOP measurements.…”

Section: Discussionmentioning

confidence: 91%

“…Several non-contact tonometers (NCTs) for the IOP assessment have been developed, showing variable statistics on the reliability of the various techniques [10,[17][18][19][20][21][22][23].…”

Section: Discussionmentioning

confidence: 99%

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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“…9 The previous generation of the Reichert (Reichert Xpert and Reichert AT550) NCT demonstrated good agreement with GAT in healthy and glaucoma patients. [10][11][12][13][14][15] The R7 uses the same formula as the ORA for measuring the IOP according to the manufacturer.…”

mentioning

confidence: 99%