Comparison of Ks, Kf and Km obtained by iTrace and IOLMaster.

<p>(Note: Ks: steep keratometry, Kf: flat keratometry, Km: mean keratometry, D: diopter, SD: standard Error, 95% CI: 95% consistent interval, * Bonferroni corrected.)</p

Bland-Altman plots present the mean plotted against the differences in values of AL (A), Kf (B), Ks (C), Km (D), ACD (E) and CD (F) for a comparison between the Toomey OA-2000 biometer and IOLMaster.

<p>The solid line indicates the mean difference. The interval between upper and lower lines represent the 95% LoA.</p

Intrasession reproducibility of ocular parameters measured by Tomey OA-2000 biometer (n = 108).

<p>Intrasession reproducibility of ocular parameters measured by Tomey OA-2000 biometer (n = 108).</p

Comparison of ocular parameters measured by Tomey OA-2000 biometer and IOLMaster (n = 108).

<p>Comparison of ocular parameters measured by Tomey OA-2000 biometer and IOLMaster (n = 108).</p

The intersession reproducibility of Ks, Kf, Km, J0 and J45 obtained by iTrace.

<p>(Note: D: diopter, SD: standard deviation, Sw: within-subject standard deviation, CoV: within-subject coefficient of variation, ICC: intraclass correlation coefficient.)</p

Intraobserver repeatability of ocular parameters measured by Tomey OA-2000 biometer (n = 108).

<p>Intraobserver repeatability of ocular parameters measured by Tomey OA-2000 biometer (n = 108).</p

Precision (repeatability and reproducibility) of ocular parameters obtained by the Tomey OA-2000 biometer compared to the IOLMaster in healthy eyes

<div><p>Purpose</p><p>To assess the precision (repeatability and reproducibility) of ocular parameters measured by the Tomey OA-2000 biometer, and to compare them with those measured by the IOLMaster.</p><p>Methods</p><p>In this prospective study, the right eyes of 108 healthy subjects were included. Three consecutive scans were obtained by 2 observers using the Tomey OA-2000, and in the same session one observer used the IOLMaster (version 5.4.4.0006) for the measurements. About 1 week later, 3 scans were obtained by one observer using the Tomey OA-2000. The axial length (AL), central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT), keratometer readings, pupil diameter (PD) and corneal diameter (CD) values measured by the Tomey OA-2000 and IOLMaster were analyzed. The coefficient of variation (CoV), intraclass correlation coefficient (ICC), within subject standard deviation (Sw) and 2.77Sw were calculated to assess the repeatability and reproducibility. The paired t test and Bland-Altman plots were used to analyze the differences and agreements of parameters measured by the two devices, respectively.</p><p>Results</p><p>Intraobserver repeatability, and interobserver and intersession reproducibility of the AL, CCT, ACD, LT, Kf, Ks, Km, PD and CD values measured by the Tomey OA-2000 biometer showed a CoV of less than 1% except that for PD, and an ICC of more than 0.97 except that for PD and CD. The AL, Kf, Ks, Km and CD values measured by the Tomey OA-2000 were 0.058 ± 0.094 mm, 0.088± 0.150 diopters (D), 0.163 ± 0.170 D, 0.127 ± 0.117 D and 0.171 ± 0.217 mm lower than those measured by the IOLMaster, respectively (all <i>Ps</i> < 0.05). However, the ACD values from the two devices were comparable (P = 0.169). The 95% linite of agreement (LoA) of the AL, ACD, CD and all keratometer readings were no more than 0.24 mm, 0.14 mm 0.60 mm and 0.5 D, respectively.</p><p>Conclusion</p><p>Except for the PD and CD, the ocular parameters measured by the Tomey OA-2000 were highly repeatable and reproducible. Except for the CD value, there was good agreement of ocular parameters measured by the Tomey OA-2000 and the IOLMaster in healthy eyes.</p></div

The intersession reproducibility of Ks, Kf, Km, J0 and J45 obtained by Topcon KR-1W.

<p>(Note: D: diopter, SD: standard deviation, Sw: within-subject standard deviation, CoV: within-subject coefficient of variation, ICC: intraclass correlation coefficient.)</p

The interobserver reproducibility of Ks, Kf, Km, J0 and J45 obtained by iTrace.

<p>(Note: D: diopter, SD: standard deviation, Sw: within-subject standard deviation, CoV: within-subject coefficient of variation, ICC: intraclass correlation coefficient.)</p

The intraobserver repeatability of Ks, Kf, Km, J0 and J45 obtained by iTrace.

<p>(Note: D: diopter, SD: standard deviation, Sw: within-subject standard deviation, CoV: within-subject coefficient of variation, ICC: intraclass correlation coefficient.)</p