Repeatability and reproducibility of optical biometry implemented in a new optical coherence tomographer and comparison with a optical low-coherence reflectometer

Kanclerz, Piotr; Hoffer, Kenneth J.; Rozema, Jos J; Przewłócka, Katarzyna; Savini, Giacomo

doi:10.1016/j.jcrs.2019.07.002

Cited by 25 publications

(50 citation statements)

References 24 publications

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“…The REVO-NX is an optical biometer combined with anterior and posterior segment SD-OCT which uses an 830nm super-luminescent laser diode to measure biometric parameters as an average of 10 B-scans. This device obtains 110,000 scans per second at a scan depth of 2.4mm, axial resolution of 5μm, and transverse resolution of 12μm [ 15 ].…”

Section: Methodsmentioning

confidence: 99%

“…Considering the novelty of the REVO-NX and its minimal published biometry investigations, sample size calculations were performed based on the recent investigation of the device on AL in normal subjects by Kanclerz et al [ 15 ]. A minimum of 47 eyes was required to produce a similar level of repeatability at a significance level of 0.05, power of 80% and standard deviation of 1.07 [ 15 ].…”

Section: Methodsmentioning

confidence: 99%

“…USA) [15], Scheimpflug imaging (Galilei G6, Ziemer, Port, Switzerland), and swept-source OCT (Casia, Tomey, Nagoya, Japan) [27].…”

Section: Plos Onementioning

confidence: 99%

“…REVO-NX anterior segment spectral-domain optical coherence tomography (AS-OCT) (Optopol Technology S.A) and Pentacam-AXL Scheimpflug imaging system (Oculus Optikgeräte GmbH) are recently introduced contact-free devices which can measure ocular biometric parameters. REVO-NX combines AS-OCT with optical biometry to generate ocular cross-sections using low-coherence interferometry [ 15 ]. Pentacam-AXL utilizes a rotating Scheimpflug imaging system and incorporates partial coherence interferometry to obtain AL measurements [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

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Repeatability and agreement of biometric measurements using spectral domain anterior segment optical coherence tomography and Scheimpflug tomography in keratoconus

Gokul

McGhee

et al. 2021

PLoS ONE

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Purpose To compare the repeatability and agreement in biometric measurements using Spectral Domain Anterior Segment OCT (AS-OCT, REVO-NX, Optopol) and Scheimpflug tomography (Pentacam-AXL, Oculus) in keratoconus. Methods Prospective case series at a university hospital tertiary center. Axial length (AL), anterior chamber depth (ACD), central corneal thickness (CCT), and thinnest corneal thickness (TCT) were measured using both devices in patients with keratoconus. Three groups were analyzed: eyes with no prior crosslinking or contact lens wear (Group A), eyes with prior crosslinking (Group B), and eyes with prior contact lens wear (Group C). Repeatability and agreement of measurements were analyzed. Results The study comprised of 214 eyes of 157 subjects. In Group A (n = 95 eyes), Group B (n = 86 eyes), and Group C (n = 33 eyes), intraclass correlation coefficient (ICC) was higher than 0.90 for all examined parameters, except for ACD readings in Group A with the REVO-NX (ICC = 0.83). Differences in ACD, TCT, and CCT were significantly different between the two devices for Groups A, B and C (p<0.05). AL measurements differed significantly in Groups A and B (p<0.05) but not in Group C (p = 0.18). Repeatability did not vary significantly between Groups A, B, or C in any parameter with both devices (p>0.05). There was poor agreement between the two devices across all parameters (p<0.05). Conclusions Both devices demonstrated good repeatability but poor agreement across AL, ACD, CCT and TCT measurements. There was no significant difference in repeatability in virgin eyes compared to eyes with prior crosslinking or contact lens wear, however, the interchangeable use of the two devices is not recommended.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…USA) [15], Scheimpflug imaging (Galilei G6, Ziemer, Port, Switzerland), and swept-source OCT (Casia, Tomey, Nagoya, Japan) [27].…”

Section: Plos Onementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Repeatability and agreement of biometric measurements using spectral domain anterior segment optical coherence tomography and Scheimpflug tomography in keratoconus

Gokul

McGhee

et al. 2021

PLoS ONE

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“…The authors presented lower ICC from 0.92-0.986 for all tested parameters compared to our study. We can hypothesize that the discrepancies between our study or Sikorski's 22 are the result of different software versions 23 .…”

Section: Discussionmentioning

confidence: 60%

Repeatability, reproducibility, and comparison of ocular biometry using a new optical coherence tomography-based system and another device

Wylęgała

Bolek

Mazur

et al. 2020

Sci Rep

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precise measurement of axial length before cataract surgery is necessary for the proper lens implantation. We included 100 eyes of 56 patients in the study. The mean age was 41 (15-84 years). Measurements of axial length, anterior chamber depth (ACD) carried out with the new Revo NX were compared with those obtained with the IOLMaster 500. Interoperator testing was performed on 56 eyes of 56 participants. To test repeatability, axial length, ACD, central corneal thickness, and lens thickness were used. Inter-operator reproducibility was also assessed. The results were evaluated using Bland-Altman analyses. The mean ACD measured with the IOLMaster and Revo NX was 3.41 and 3.40 mm p = 0.467, respectively. The interclass correlation was excellent at the level of 0.975. ICC for axial length values was 0.999, and the mean was equal to 23.47 for the new device and 23.48 for IOLMaster. ICC for Inter-operator repeatability was higher than 0.99 in all parameters. Revo NX showed a very high level of repeatability with ICC ranging from 0.9929 for central corneal thickness to 0.9997 for axial length. Both devices showed excellent agreement and differences that are insignificant, which suggests that they can be used interchangeably. Surgery is the only currently known way of treating cataracts. During the procedure, the opacified lens is extracted, and an intraocular lens is inserted. The power of the intraocular lens must be calculated before the surgery using the mathematical formulas that usually require axial length (AL), corneal power, anterior chamber depth (ACD). Failed measurement can lead to incorrect implantation resulting in postoperative refractive error 1. Currently, the AL and ACD can be measured with ultrasounds, partial coherence interferometry, optical low-coherence reflectometry, and optical coherence tomography. The primary advantage of optical coherence tomography-based systems is that they allow visualization of the entire eye. Hence any abnormalities which might affect calculations such as posterior staphyloma, lens tilt, macular edema, or poor fixation can also be diagnosed 2. Spectral-domain optical coherence tomography (SD-OCT) is a powerful optical coherence tomography technology that has been in use to image both the anterior and posterior segments 3-5. Recently with the introduction of IOLMaster 700 (Carl Zeiss Meditec, Jena, Germany) the importance of visualization of the entire AL during intraocular lens calculations has been shown 2. However, IOLMaster 700 provides only screening quality and can only obtain the image of a small area (1 mm width) around the macula. The huge advantage of an optical coherence tomography-based system is that it can be used as both the imaging device that can produce crosssections of the anterior segment and the retina, oct angiography and measure values such as macular or retinal nerve fiber layer thickness while still functioning as a biometer used to calculate the lens implantation. Another application of AL measurement is to monitor patients with high myopia. Whi...

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Optical Biometry

Findl

Hirnschall

2023

Cataract and Lens Surgery

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Repeatability and reproducibility of optical biometry implemented in a new optical coherence tomographer and comparison with a optical low-coherence reflectometer

Cited by 25 publications

References 24 publications

Repeatability and agreement of biometric measurements using spectral domain anterior segment optical coherence tomography and Scheimpflug tomography in keratoconus

Repeatability and agreement of biometric measurements using spectral domain anterior segment optical coherence tomography and Scheimpflug tomography in keratoconus

Repeatability, reproducibility, and comparison of ocular biometry using a new optical coherence tomography-based system and another device

Optical Biometry

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