Agreement of anterior ocular biometric measurements with a new optical biometer and a Scheimpflug tomographer

McAlinden, Colm; Bao, Fangjun; Guo, Yan; Yu, Xinxin; Lü, Wei; Chen, Hao; Wang, Qinmei; Huang, Jinhai

doi:10.1016/j.jcrs.2016.01.043

Cited by 8 publications

(7 citation statements)

References 22 publications

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“…As part of the assessment of any new device, it is important to compare agreement among similar devices. 31,32 As the results show in Table 6 and in the figures, the mean difference among the four biometers was close to 0 mm without statistical significance. Yang et al 9 found that in patients with myopia and an axial length of 27 mm, the mean difference between IOLMaster 700 and IOLMaster v5.4 was larger, especially for those with posterior staphyloma (mean difference of 0.095 ± 0.182 mm, range: -0.11 to 1.48 mm, P < .001).…”

Section: Discussionmentioning

confidence: 65%

Comprehensive Comparison of Axial Length Measurement With Three Swept-Source OCT-Based Biometers and Partial Coherence Interferometry

Huang¹,

Chen²,

Li³

et al. 2019

J Refract Surg

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, which was introduced in 1999. It became widely adopted as the gold standard for intraocular lens selection at the time of cataract surgery. 1 It is based on partial coherence interferometry (PCI). Good precision of the device has been reported, but the failure rate for axial length measurement is approximately 17.5% to 37.84%. 1-5 Optical low coherence reflectometry and optical low coherence interfer-ABSTRACT PURPOSE: To compare axial length measurements (and failure rate) of three swept-source optical coherence tomography (SS-OCT)-based biometers: IOLMaster 700 (Carl Zeiss Meditec, Jena, Germany), OA-2000 (Tomey, Nagoya, Japan), and Argos (Movu Inc., Komaki, Japan) to those provided by a partial coherence interferometry (PCI)-based optical biometer (IOLMaster v5.4 [Carl Zeiss Meditec]). METHODS: A total of 119 patients (171 eyes) undergoing cataract surgery were enrolled. Axial length was measured with the four biometers in a random order. Chi-square analysis was used to determine whether statistically significant differences in success rates were found between biometers. Within-subject standard deviation (S w), test-retest repeatability (TRT), coefficient of variation (CoV), and intraclass correlation coefficients (ICCs) were calculated to analyze the intraobserver repeatability. Bland-Altman plots were used for agreement assessment. RESULTS: Axial length measurements were successfully measured in 166 eyes (97.08%) with the IOLMaster 700, 166 eyes (97.08%) with the OA-2000, 170 eyes (99.42%) with the Argos, and 138 eyes (80.70%) with the IOLMaster v5.4. Chisquare analysis indicated a significant difference in the failure rate between PCI-and SS-OCT-based biometers (P < .001). Intraobserver repeatability for the IOLMaster 700, OA-2000, and Argos showed excellent repeatability with low TRT (0.03, 0.06, and 0.05 mm, respectively), low CoV (0.04%, 0.10%, 0.07%, respectively), and high ICC (1.000, 0.999, and 1.000, respectively). The Bland-Altman 95% limits of agreement were as narrow as 0.09 mm, indicating excellent agreement among the three SS-OCT biometers and the PCI biometer. CONCLUSIONS: The three SS-OCT biometers showed a significantly higher success rate for axial length measurement than the IOLMaster v5.4 in various lens opacities. These SS-OCT biometers are likely to become the gold standard for axial measurement.

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Section: Discussionmentioning

confidence: 65%

Comprehensive Comparison of Axial Length Measurement With Three Swept-Source OCT-Based Biometers and Partial Coherence Interferometry

Huang¹,

Chen²,

Li³

et al. 2019

J Refract Surg

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“…Clinically interchangeable K readings between Pentacam HR and AL-Scan (an optical biometer) was reported. 61 Good agreement and interchangeable keratometry readings was reported between Sirius and Lenstar LS900. 62 No significant difference in keratometric measurements was found in Pentacam AXL and biometer IOLMaster 500, but caution was warranted when using them interchangeably.…”

Section: Agreementmentioning

confidence: 89%

“…Studies comparing Scheimpflug topographers and optical biometers have shown potential interchangeability in keratometry readings between them. Clinically interchangeable K readings between Pentacam HR and AL‐Scan (an optical biometer) was reported . Good agreement and interchangeable keratometry readings was reported between Sirius and Lenstar LS900 .…”

Section: Comparison Among Different Devices: Repeatability and Agreementmentioning

confidence: 97%

“…Good agreement and interchangeability were reported for central corneal thickness measurements between Scheimpflug topographers (Sirius and Pentacam, respectively) and Lenstar LS900 OLCR biometer . Good agreement and clinically interchangeable measurements in central corneal thickness values were also reported between Scheimpflug topographers (Pentacam and Galilei) and Nidek (Nidek Co., Aichi, Japan) AL‐Scan (a new optical biometer) . However, other studies showed that they are not interchangeable.…”

Section: Comparison Among Different Devices: Repeatability and Agreementmentioning

confidence: 99%

“…62,108 Good agreement and clinically interchangeable measurements in central corneal thickness values were also reported between Scheimpflug topographers (Pentacam and Galilei) and Nidek (Nidek Co., Aichi, Japan) AL-Scan (a new optical biometer). 61,109 However, other studies showed that they are not interchangeable. The central corneal thickness measured with Nidek AL-Scan was reportedly thinner as compared to Sirius.…”

Section: Agreementmentioning

confidence: 99%

See 2 more Smart Citations

Applications of corneal topography and tomography: a review

Fan

Chan

Prakash³

et al. 2018

Clinical Exper Ophthalmology

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Corneal imaging is essential for diagnosing and management of a wide variety of ocular diseases. Corneal topography is used to characterize the shape of the cornea, specifically, the anterior surface of the cornea. Most corneal topographical systems are based on Placido disc that analyse rings that are reflected off the corneal surface. The posterior corneal surface cannot be characterized using Placido disc technology. Imaging of the posterior corneal surface is useful for diagnosis of corneal ectasia. Unlike corneal topographers, tomographers generate a three-dimensional recreation of the anterior segment and provide information about the corneal thickness. Scheimpflug imaging is one of the most commonly used techniques for corneal tomography. The cross-sectional images generated by a rotating Scheimpflug camera are used to locate the anterior and posterior corneal surfaces. The clinical uses of corneal topography include, diagnosis of corneal ectasia, assessment of corneal astigmatism, and refractive surgery planning. This review will discuss the applications of corneal topography and tomography in clinical practice.

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Evaluation of the repeatability of a swept-source ocular biometer for measuring ocular biometric parameters

Ferrer-Blasco

Domínguez‐Vicent

Esteve-Taboada

et al. 2016

Graefes Arch Clin Exp Ophthalmol

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Agreement of anterior ocular biometric measurements with a new optical biometer and a Scheimpflug tomographer

Abstract: None of the authors has a financial or proprietary interest in any material or method mentioned.

Cited by 8 publications

References 22 publications

Comprehensive Comparison of Axial Length Measurement With Three Swept-Source OCT-Based Biometers and Partial Coherence Interferometry

Comprehensive Comparison of Axial Length Measurement With Three Swept-Source OCT-Based Biometers and Partial Coherence Interferometry

Applications of corneal topography and tomography: a review

Evaluation of the repeatability of a swept-source ocular biometer for measuring ocular biometric parameters

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