Comparison of Ocular Biometry and Refractive Measurements from Myopia Master with Lenstar and KR-1 Autorefractor
10.3341/jkos.2024.65.12.778
- Author:
Sang Un YI
1
;
Hae Ri YUM
Author Information
1. Department of Ophthalmology, Eunpyeong St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
- Publication Type:Original Article
- From:Journal of the Korean Ophthalmological Society
2024;65(12):778-785
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Purpose:To compare axial length (AL), keratometry (K), and refractive measurements using Myopia Master, Lenstar, and KR-1 autorefractor.
Methods:The study involved 44 eyes of 44 children who visited our clinic. We compared AL, flat K, steep K, mean K, and spherical equivalent (SE) measured by Myopia Master, Lenstar, and KR-1. We utilized a paired t-test and RM-ANOVA to compare mean differences and used Bland–Altman plots, intraclass correlation coefficients (ICCs), and Pearson correlation tests for agreement analysis.
Results:The mean ALs (mm) measured with Myopia Master and Lenstar were 24.59 ± 0.91 mm and 24.60 ± 0.91 mm, respectively, with no statistical differences (p = 0.085). Both the ICC and Pearson correlation coefficient were 0.999. The mean SEs (D) measured with Myopia Master and KR-1 were -3.32 ± 1.75 D and -3.18 ± 1.68 D, respectively, with significant differences (p < 0.001). The ICC was 0.996 and the Pearson correlation coefficient was 0.995. The mean K (D) values measured by Myopia Master, KR-1, and Lenstar were 43.15 ± 1.59 D, 43.38 ± 1.58 D, and 43.32 ± 1.63 D, respectively, and differed significantly (p < 0.001).
Conclusions:While statistical differences emerged in SEs between Myopia Master and KR-1, the differences were not clinically significant and the tools may be used interchangeably due to their good agreement. However, measured K values differed among Myopia Master, KR-1, and Lenstar, so these tools are not interchangeable. Based on the results from paired t-tests, ICCs, and Pearson correlations, AL measurements were in good agreement between Myopia Master and Lenstar but caution should be exercised due to the wider range of measured values.
