Repeatability and comparability of a new swept-source optical coherence tomographer in optical biometry

Lucas, C.E. Monera; Serrano, J. Escolano; Jaimes, C. Tarazona; Valero, D. Romero; Martinez, Angelly; Toldos, J.J. Martínez

doi:10.1016/j.oftale.2022.04.003

Cited by 3 publications

(10 citation statements)

References 22 publications

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“…The consistency of AL, CCT and ACD measures obtained for the new optical biometer evaluated was excellent in the sample of healthy eyes evaluated, with Sw of 0.004 mm, 4.394 µm, and 0.017 mm, respectively. These Sw values were similar to those reported for the anatomical measures obtained with PCI, SS-OCT, optical low-coherence reflectometry (OLCR), and Scheimpflug camera-based biometers [4,[14][15][16][17][18]. Hashemi et al [14] reported Sw values of 0.02 mm and 0.02 mm for AL and ACD measurements, respectively, obtained with an instrument consisting of a dual rotating Scheimpflug camera, a Placido disk topographer, and an optical coherence tomography-based A-scan.…”

Section: Discussionsupporting

confidence: 84%

Validation of a New Spectral-Domain Optical Coherence Tomog-Raphy-Based Biometer

Alió,

José-Martínez,

Martínez-Abad

et al. 2023

Preprint

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The VEMoS AXL system is a new optical biometer based on spectral domain optical coherence tomography (SD-OCT) that has been tested in terms of intrasession repeatability and compared with a swept-source optical coherence tomography biometer (SS-OCT), which is considered the gold standard, for an agreement analysis. A biometric analysis was performed three consecutive times in 120 healthy eyes of 120 patients aged between 18 and 40 years with the SD-OCT system and afterwards a single measurement was obtained with the SS-OCT system. Within-subject standard deviations were 0.004 mm, 4.394 µm and 0.017 mm for axial length (AL), central corneal thickness (CCT), and anterior chamber depth (ACD) measures obtained with the SD-OCT biometer, re-spectively. The agreement between devices was good for AL (Limits of agreement, LoA: -0.04 to 0.03 mm) and CCT (LoA: -4.36 to 14.38 µm), whereas differences between devices were clinically relevant for ACD (LoA: 0.03 to 0.21 mm). In conclusion, the VEMoS AXL system provides consistent measures of anatomical parameters, being most of them interchangeable with those provided by the SS-OCT-based gold standard.

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Section: Discussionsupporting

confidence: 84%

Validation of a New Spectral-Domain Optical Coherence Tomog-Raphy-Based Biometer

Alió,

José-Martínez,

Martínez-Abad

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…The consistency of AL, CCT, and ACD measures obtained for the new optical biometer evaluated was excellent in the sample of healthy eyes evaluated, with S w of 0.004 mm, 4.394 µm, and 0.017 mm, respectively. These S w values were similar to those reported for the anatomical measures obtained with PCI, SS-OCT, optical low-coherence reflectometry (OLCR), and Scheimpflug camera-based biometers [ 4 , 14 , 15 , 16 , 17 , 18 ]. Hashemi et al [ 14 ] reported S w values of 0.02 mm and 0.02 mm for AL and ACD measurements, respectively, obtained with an instrument consisting of a dual rotating Scheimpflug camera, a Placido disk topographer, and an optical coherence tomography-based A-scan.…”

Section: Discussionsupporting

confidence: 83%

“…The mean difference between biometers was 0.12 mm, with limits of agreement of 0.03 and 0.21 mm. This difference was statistically significant as well as clinically relevant, considering the trend an overestimation of ACD with the VEMoS-AXL system and that the limits of agreement were in the range of those reported in studies comparing biometers and concluding that ACD measures were not interchangeable [ 5 , 6 , 13 , 14 , 15 , 16 , 17 ]. Moon et al [ 16 ] concluded that ACD measures obtained with Anterion and IOL-Master 500 systems were not interchangeable (limits of agreement, −0.33 to 0.22 mm) as well as ACD measurements obtained with OA-2000 and IOL-Master 500 biometers (limits of agreement, −0.37 to 0.20 mm).…”

Section: Discussionmentioning

confidence: 53%

“…Several studies have investigated the level of intrasession repeatability of the last generation of optical biometers, including those based on SS-OCT [ 14 , 15 , 16 , 17 , 18 ], in order to know the consistency of the anatomical measures obtained with these devices. It should be considered that such measurements are crucial in the clinical practice, especially for IOL power calculations when planning cataract surgeries.…”

Section: Discussionmentioning

confidence: 99%

“…Hashemi et al [ 14 ] reported S w values of 0.02 mm and 0.02 mm for AL and ACD measurements, respectively, obtained with an instrument consisting of a dual rotating Scheimpflug camera, a Placido disk topographer, and an optical coherence tomography-based A-scan. Monera Lucas et al [ 15 ] obtained S w values of 0.005 mm, 0.043 mm, and 1.1 µm when evaluating the intrasession repeatability of the measurements of AL, ACD, and CCT, respectively, obtained with a SS-OCT biometer. With this same SS-OCT-based device, Cheng et al [ 17 ] reported mean S w values of 0.0064 mm, 0.011 mm, and 1.25 µm for AL, ACD, and CCT measures, respectively.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Clinical Evaluation of a New Spectral-Domain Optical Coherence Tomography-Based Biometer

Alió,

José-Martínez,

Martínez-Abad

et al. 2024

Diagnostics

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The VEMoS-AXL system is a new optical biometer based on spectral domain optical coherence tomography (SD-OCT) that has been tested in terms of intrasession repeatability and compared with a swept-source optical coherence tomography biometer (SS-OCT), which is recognized as the gold standard for the performance of an agreement analysis. A biometric analysis was performed three consecutive times in 120 healthy eyes of 120 patients aged between 18 and 40 years with the SD-OCT system, and afterwards, a single measurement was obtained with the SS-OCT system. Within-subject standard deviations were 0.004 mm, 4.394 µm, and 0.017 mm for axial length (AL), central corneal thickness (CCT), and anterior chamber depth (ACD) measures obtained with the SD-OCT biometer, respectively. The agreement between devices was good for AL (limits of agreement, LoA: −0.04 to 0.03 mm) and CCT (LoA: −4.36 to 14.38 µm), whereas differences between devices were clinically relevant for ACD (LoA: 0.03 to 0.21 mm). In conclusion, the VEMoS-AXL system provides consistent measures of anatomical parameters, being most of them interchangeable with those provided by the SS-OCT-based gold standard.

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Evaluation of repeatability and agreement of two optical biometers for intraocular lens power calculation

Alberquilla,

Svensson,

Ruiz-Alcocer

et al. 2024

Sci Rep

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The repeatability of two biometers (Lenstar-LS900 and Eyestar-900) to measure ocular parameters and intraocular lens (IOL) power calculation, and their agreement were evaluated. 134 eyes of 134 participants were measured thrice with each biometer. Axial length (AL), anterior chamber depth (ACD), lens thickness (LT) and keratometry (K) were evaluated. The IOL power was calculated using different formulas. The repeatability limit (RLimit), the mean differences (MD) and the limits of agreement (LoA) were calculated. The RLimits for all parameters were higher with Lenstar compared to Eyestar. RLimits were lower than 0.50 D except for Barrett Universal II (0.54 D) and Haigis (0.51 D) formulas with the Lenstar. Mean differences were lower than 0.01 mm for AL, ACD and LT, and lower than 0.03 D for K. MD ranged from 0 to 0.02 D for all formulas except for Barrett and Hill. When dividing the sample into subgroups (short, normal and long eyes), the MDs were similar for the IOL power and were lower than 0.03 D, except for the Barrett and Hill formulas. Both biometers provide repeatable biometry and IOL power calculations. The LoA interval for the IOL power calculation was between 0.75 and 1.50D, which was similar among the subgroups.

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Repeatability and comparability of a new swept-source optical coherence tomographer in optical biometry

Cited by 3 publications

References 22 publications

Validation of a New Spectral-Domain Optical Coherence Tomog-Raphy-Based Biometer

Validation of a New Spectral-Domain Optical Coherence Tomog-Raphy-Based Biometer

Clinical Evaluation of a New Spectral-Domain Optical Coherence Tomography-Based Biometer

Evaluation of repeatability and agreement of two optical biometers for intraocular lens power calculation

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