A Comparison of Optical Biometers Used in Children for Myopia Control

Mattern, Ann-Isabel; Neller, Kai; Devenijn, Machteld; Kaymak, Hakan; Langenbucher, Achim; Seitz, Berthold; Schwahn, Hartmut

doi:10.1055/a-2117-9335

Cited by 7 publications

(18 citation statements)

References 32 publications

(48 reference statements)

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“…A small number of previous studies among children with a range of refractive error (−6.00 to +1.38 D) have explored agreement between the MYAH and the Myopia Master, Pentacam AXL, and IOLMaster 700. 14,22,23 Similar to the present study, the mean difference for axial length in children between the MYAH and IOLMaster 700 was 0.01 mm (95% LoAs, −0.05 to 0.05 mm), and that between the MYAH and Pentacam AXL was −0.01 mm (95% LoAs, −0.06 to 0.07 mm). 10,22,23 Comparison between the MYAH and Myopia Master showed that the mean difference in axial length (0.03 mm [95% LoAs, −0.09 to 0.15 mm]) 14 was higher with wider LoAs compared with the current study results.…”

Section: Discussionsupporting

confidence: 88%

“…14,22,23 Similar to the present study, the mean difference for axial length in children between the MYAH and IOLMaster 700 was 0.01 mm (95% LoAs, −0.05 to 0.05 mm), and that between the MYAH and Pentacam AXL was −0.01 mm (95% LoAs, −0.06 to 0.07 mm). 10,22,23 Comparison between the MYAH and Myopia Master showed that the mean difference in axial length (0.03 mm [95% LoAs, −0.09 to 0.15 mm]) 14 was higher with wider LoAs compared with the current study results. The possible reason behind overall wider and variable LoAs among previous studies could be related to investigating a pediatric population as opposed to adults.…”

Section: Discussionsupporting

confidence: 88%

“…The agreement between the MYAH and Lenstar was good for corneal power with no significant difference between the devices in the current study, in contrary to the findings between the MYAH and Pentacam AXL/IOLMaster 700/Myopia Master in children. 14,22,23 The differences between the MYAH and Lenstar for white-to-white distance and pupil diameter in the present study were also small but reached statistical significance, similar to the findings between the MYAH and Pentacam AXL/IOLMaster 700/Myopia Master in children. There was a participant who showed a difference of 0.3 D and 0.4 mm in corneal power and white-to-white measurements, respectively, between the two instruments, which was outside the confidence limits.…”

Section: Discussionsupporting

confidence: 87%

“…Previous studies in children have reported the repeatability of the MYAH and agreement with other available devices, including the Myopia Master, the IOLMaster 700, and the Pentacam AXL (Oculus GmbH) 14,22,23 . The MYAH showed good intrasession repeatability for corneal radius, white-to-white distance, and axial length 14 .…”

supporting

confidence: 64%

“…The MYAH showed good intrasession repeatability for corneal radius, white-to-white distance, and axial length 14 . When compared with Pentacam AXL and IOLMaster 700, the MYAH demonstrated good agreement for keratometry and axial length in myopic children 22,23 . Another study in children explored the agreement between the MYAH and Myopia Master for axial length, corneal power, and white-to-white distance and found that the instruments were interchangeable, but with some caution due to small but significant differences in axial length between devices of 0.03 mm 14 …”

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confidence: 99%

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Repeatability and agreement of the MYAH and Lenstar

Lal,

Cantrell,

Ostrin

2024

Optom Vis Sci

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SIGNIFICANCE Validation of new biometry instruments against the gold standard and establishing repeatability are important before being utilized for clinical and research applications. PURPOSE This study aimed to investigate intersession repeatability of the MYAH optical biometer and corneal topographer and examine agreement with the Lenstar LS900 optical biometer in healthy young adults. METHODS Forty participants (mean age, 25.2 ± 3.1 years) presented for two visits, 2 to 4 days apart. At each visit, measurements for right eyes were collected with the MYAH and Lenstar LS 900 and included axial length, corneal power, white-to-white distance, and pupil diameter. Bland-Altman analysis was used to assess the intrasession agreement between the MYAH and Lenstar for each parameter and intersession repeatability for the two devices. For each device, coefficient of variation and intraclass correlation coefficient were calculated, and paired t tests between visits were performed to assess intersession repeatability. RESULTS Good agreement (mean difference [95% limits of agreement]) between the MYAH and Lenstar was found for axial length (−0.01 [−0.07 to 0.04] mm), corneal power (−0.02 D [−0.15 to 0.19 d]), white-to-white distance (−0.13 [−0.43 to 0.17] mm), and pupil diameter (−0.27 [−0.79 to 1.33] mm). The limits of agreement, coefficient of variations, and intraclass correlation coefficients for MYAH-measured parameters were −0.04 to 0.04, 0.06%, and >0.99 for axial length; −0.24 to 0.19, 0.18%, and >0.99 for corneal power; −1.05 to 1.15, 0.57%, and 0.96 for white-to-white distance; and −0.17 to 0.21, 7.0%, and 0.76 for pupil diameter, with no significant difference between visits (p>0.05 for all), indicating good intersession repeatability. Similar intersession repeatability was also noted for Lenstar. CONCLUSIONS Findings show good intersession repeatability of the MYAH and good agreement with the Lenstar for axial length, corneal power, and white-to-white distance in young adults. Pupil diameter was more variable, likely due to the dynamic nature of the pupil. This study provides validation and supports the use of the MYAH for ocular biometry.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionsupporting

confidence: 88%

Section: Discussionsupporting

confidence: 87%

supporting

confidence: 64%

mentioning

confidence: 99%

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Repeatability and agreement of the MYAH and Lenstar

Lal,

Cantrell,

Ostrin

2024

Optom Vis Sci

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Suitability of multifunction devices Myah and Myopia Master for monitoring myopia progression in children and adults

Chow,

Mungalsingh,

Thai

et al. 2024

Ophthalmic Physiologic Optic

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PurposeTo assess the feasibility of using multifunction instruments to measure axial length for monitoring myopia progression in children and adults.MethodsAxial length was measured in 60 children (aged 6–18 years) and 60 adults (aged 19–50 years) with multifunction instruments (Myah and Myopia Master) and stand‐alone biometers (Lenstar LS900 and IOLMaster 700). Repeatability (measurements by the same examiner) and reproducibility (measurements by different examiners) were computed as the within‐subject standard deviation (Sw) and 95% limits of agreement (LoA). Inter‐instrument agreement was computed as intraclass correlation coefficients. The threshold for detecting myopic progression was taken as 0.1 mm. Measures were repeated only in children following the administration of 1% tropicamide to determine the impact of cycloplegia on axial length.ResultsOverall, the IOLMaster 700 had the best repeatability in children (0.014 mm) and adults (0.009 mm). Repeatability Sw values for all devices ranged from 0.005 to 0.021 mm (children) and 0.003 to 0.016 mm (adults). In children, reproducibility fell within 0.1 mm 95% of the time for the Myah, Myopia Master and IOLMaster 700. Agreement among all devices was classified as excellent (ICC 0.999; 95% CI 0.998–0.999), but the 95% LoA among the Myah, Myopia Master and Lenstar LS900 was ≥0.1 mm. Cycloplegia had no statistically significant effect on axial length (all p > 0.13).ConclusionsThe Myah and Myopia Master multifunction instruments demonstrated good repeatability and reproducibility, and their accuracy was comparable to stand‐alone biometers. Axial length measurements using different instruments can be considered interchangeable but should be compared with some caution. Accurate axial length measurements can be obtained without cycloplegia. The multifunction instruments Myah and Myopia Master are as well suited for monitoring myopia progression in children as the stand‐alone biometers IOLMaster 700 and Lenstar LS900.

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Age-matched analysis of axial length growth in myopic children wearing defocus incorporated multiple segments spectacle lenses

Graff,

Lam,

Vlasak

et al. 2023

Br J Ophthalmol

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Background/aimsDefocus incorporated multiple segments (DIMS) spectacle lenses are known to be able to inhibit axial length (AL) growth in myopic children compared with single vision (SV) spectacle lenses. However, it is not known whether AL growth is sufficiently inhibited to achieve the treatment goal of physiological AL growth.MethodsOf the data already collected in 2014–2017 by Lamet al, the AL growth with DIMS and SV spectacle lenses was re-evaluated according to the age-matched myopia control system. The individual AL growth after the first year of treatment of each eye was plotted against the corresponding age of the same time point in a colour-coded scheme. The two treatment groups were further subdivided based on their age and their baseline AL.ResultsOverall, 65% (61% of male, 70% of female) of eyes with DIMS spectacle lenses and 16% (16% of male, 16% of female) of eyes with SV spectacle lenses are within range of physiological AL growth rate. Median AL growth rate of eyes with DIMS spectacle lenses is also within the range of physiological growth. In the subgroups, eyes with DIMS spectacle lenses were also superior to the ones with SV spectacle lenses regarding this treatment goal. Of the children with SV spectacle lenses, older children and children with eyes with high baseline AL were least likely to achieve physiological AL growth rate.ConclusionsDIMS spectacle lenses can bring the AL growth rate of myopic children to the level of physiological AL growth rate, indicating 100% reduction of excessive myopic AL growth, independent of age and baseline AL. Older children and children with eyes with high AL have the risk to have increased AL growth without treatment.

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A Comparison of Optical Biometers Used in Children for Myopia Control

Cited by 7 publications

References 32 publications

Repeatability and agreement of the MYAH and Lenstar

Repeatability and agreement of the MYAH and Lenstar

Suitability of multifunction devices Myah and Myopia Master for monitoring myopia progression in children and adults

Age-matched analysis of axial length growth in myopic children wearing defocus incorporated multiple segments spectacle lenses

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