Clinical Publications

MYAH

Agreement of axial length and anterior segment parameters measured with the MYAH device compared to Pentacam AXL and IOLMaster 700 in myopic children

AUTHORS:

Sabur, H., Takes, O.

PUBLICATION:

Int Ophthalmol. 2023 Feb;43(2):475-482. doi: 10.1007/s10792-022-02444-w. Epub 2022 Jul 31.

Study Purpose

To compare the difference and agreement of axial length (AL) and anterior segment parameters obtained from the MYAH device with Pentacam AXL and IOLMaster 700 in myopic children

Overview

Study Design

Retrospective comparative study

# of Eyes/
Patients

60 eyes of 60 myopic children; aged 7–16 years, mean age was 10.2 ± 1.8 years

Study Device

MYAH (Topcon EU, Visia Imaging, Japan)
IOLMaster® 700 (Carl Zeiss Meditec AG, Germany)
Pentacam® AXL (Oculus Optikgerate GmbH, Germany)

Outcome Measures

Difference between devices in measurements of mean axial length value (AL), mean steep keratometry (steep K), flat K, mean K, and horizontal corneal diameter (CD)

Results

No statistically significant difference was determined between the Pentacam AXL, IOLMaster 700, and MYAH devices in terms of mean AL values
The mean AL values were measured as 23.61 ± 1.42 mm (21.74 – 28.22 mm) for the Pentacam AXL, 23.62 ± 1.45 mm (21.77 to 28.23 mm) for the IOLMaster 700, and 23.61 ± 1.42 mm (21.76–28.22) for the MYAH
A significantly strong agreement was determined between the three devices with the ICC and Bland–Altman plots [r = 0.999 (0.999–1.00)] (Figure 1)
The difference between devices in the mean steep K, flat K, mean K, and CD was statistically significant but clinically insignificant (steep K; 44.45 ± 1.25, 44.59 ± 1.23, 44.51 ± 1.24, flat K; 43.29 ± 1.28, 43.43 ± 1.29, 43.35 ± 1.30, mean K; 43.85 ± 1.21, 44.00 ± 1.19, 43.94 ± 1.20, and CD; 11.90 ± 0.34, 12.11 ± 0.38, 11.96 ± 0.31, respectively; p < 0.05)
ICC and Bland–Altman plot analysis revealed a high correlation between the three devices in AL, steep K, flat K, mean K, and CD

IMOvifa reduced measurement time by

39%

FIGURE 1

FIGURE 1.

Adapted from Int Ophthalmol. 2023 Feb;43(2):475-482. doi: 10.1007/s10792-022-02444-w. Epub 2022 Jul 3

Conclusions

• This study shows good agreement between the MYAH, Pentacam AXL, and IOLMaster 700 devices regarding AL and anterior segment parameters • MYAH provides reliable measurements and will be a good option in the diagnosis of and follow- up with myopic children