Agreement of Anterior Segment Parameter Measurements With CASIA 2 and IOLMaster 700

Ruan, Xiaoting; Yang, Guangyao; Zhang, Jiaqing; Gu, Xiaoxun; Tan, Yuan; Liu, Zhenzhen; Luo, Lixia

doi:10.3389/fmed.2022.777443

Cited by 7 publications

(4 citation statements)

References 29 publications

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“…Previous studies demonstrated that a larger measurement diameter rendered higher corneal irregularity, 26 , 27 so the measurement meridians or analyzed zone could have a significant impact on TK, PK, and corresponding astigmatism. The axial resolution of CASIA2, IOLMaster 700, and Pentacam AXL is ≤10 µm, 22 µm, and 50 µm, respectively, 24 , 28 , 29 which could be another possible reason for the difference in TK and PK measurements among devices.…”

Section: Discussionmentioning

confidence: 99%

Agreement of Total Keratometry and Posterior Keratometry Among IOLMaster 700, CASIA2, and Pentacam

Jin

Han

Zhang

et al. 2023

Trans. Vis. Sci. Tech.

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Purpose The purpose of this study was to compare total keratometry (TK) and posterior keratometry (PK) obtained by two swept-source optical biometers (IOLMaster 700 and CASIA2) and one Scheimpflug-based topography (Pentacam AXL). Methods The TK and PK in cataract surgery candidates obtained by IOLMaster 700, CASIA2, and Pentacam AXL were compared. Intraclass correlation coefficients (ICCs), limit of agreement, and Bland-Altman plots were used to assess the agreement. Results One hundred two patients with a mean age of 68.21 ± 8.70 years were included. There were significant differences among IOLMaster 700, CASIA2, and Pentacam AXL in the mean TK (TK m ) (44.23 ± 1.59 diopters [D] vs. 43.25 ± 1.53 D vs. 43.94 ± 1.68 D; all P < 0.001), mean PK (PK m ; −5.90 ± 0.24 D vs. −6.25 ± 0.25 D vs. −6.37 ± 0.26 D; all P < 0.001) and TK-J0 (−0.34 ± 0.65 D vs. −0.23 ± 0.53 D vs. −0.12 ± 0.62 D; all P < 0.001). We also observed significant differences in PK-J45 between IOLMaster 700 and Pentacam AXL as well as between CASIA2 and Pentacam AXL (both P < 0.001). There was a good agreement in TK m , TK-J0, TK-J45, and PK-J0 (ICC = 0.887, 0.880, 0.751, and 0.807, respectively), a moderate agreement in PK-J45 (ICC = 0.626), and a poor agreement in PK m (ICC = 0.498) among these 3 biometers. Conclusions TK, PK, and the corresponding astigmatism obtained by IOLMaster 700, CASIA2, and Pentacam AXL showed significant differences, and could not be used interchangeably. Translational Relevance Our study may help to guide preoperative keratometry measurement for intraocular lens (IOL) power calculation and astigmatism evaluation for patients with cataract.

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Section: Discussionmentioning

confidence: 99%

Agreement of Total Keratometry and Posterior Keratometry Among IOLMaster 700, CASIA2, and Pentacam

Jin

Han

Zhang

et al. 2023

Trans. Vis. Sci. Tech.

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“…In terms of ACD and AQD measurements, the SW-9000 presented lower values than the MS-39, as the mean difference were − 0.10 ± 0.03 mm and − 0.10 ± 0.04 mm, while the 95% LoAs were − 0.16 to − 0.05 mm and − 0.18 to − 0.03 mm, respectively. These intervals were slightly narrower than those reported by Ruan et al, who separately assessed agreement between the IOLMaster 700 (Carl Zeiss Meditec, Jena, Germany) and CASIA 2, yielding 95% LoAs of − 0.03 to 0.24 mm for ACD and 0.04 to 0.25 mm for AQD [ 25 ]. Similar results were reported when comparing the MS-39 and the Argos (− 0.01 ± 0.03 mm) for ACD and AQD measurements, which were insufficient to produce noticeable differences in clinic [ 19 ].…”

Section: Discussionmentioning

confidence: 72%

Agreement between a new optical low coherence reflectometry biometer and an anterior segment optical coherence tomographer

et al. 2023

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Background To assess agreement of measurements between a new optical low coherence reflectometry (OLCR) biometer (SW-9000, Suoer, Tianjin, China) and a spectral-domain optical coherence tomographer (SD-OCT)/Placido topographer (MS-39, CSO, Florence, Italy) in healthy subjects. Methods A total of 66 right eyes from 66 healthy subjects were enrolled in this prospective study. Three consecutive measurements were randomly obtained with both devices by the same experienced operator to assess agreement. Bland-Altman plots and 95% limits of agreement (LoA) were used to verify the agreement between the devices. Results are presented as mean ± standard deviation (SD). Results The SD-OCT/Placido tomographer showed high agreement with the OLCR biometer for all parameters included in this study. The mean differences of central corneal thickness (CCT), anterior chamber depth (ACD), aqueous depth (AQD), mean keratometry (Km) and corneal diameter (CD) were 2.21 ± 2.67 μm (P < 0.001), − 0.10 ± 0.03 mm (P < 0.001), − 0.10 ± 0.04 mm (P < 0.001), − 0.01 ± 0.22 D (P = 0.773) and 0.20 ± 0.16 mm (P < 0.001), respectively. This implies that the inter-device difference in Km was not statistically significant, while the differences in CCT, ACD, AQD, CD were statistically but not clinically significant. The 95% LoAs of CCT, ACD, AQD, Km and CD were − 3.01 to 7.44 μm, − 0.16 to − 0.05 mm, − 0.18 to − 0.03 mm, − 0.45 to 0.43 D, and − 0.12 to 0.51 mm, respectively. Conclusions For CCT, ACD, AQD, Km, and CD in healthy subjects, the new OLCR biometer has high agreement with the SD-OCT/Placido tomographer and can be used interchangeably due to the narrow range of 95% LoAs.

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“…Other parameters, such as the K1, K2, and mean K values showed insignifi- that a 0.5 D variation in corneal curvature was still clinically acceptable [17]. The Pentacam AXL measured diameter values of 3.0 mm and 4.0 mm for the anterior and total cornea, respectively, while IOL Master 700 obtained 2.5 mm for both of them [16].…”

Section: Discussionmentioning

confidence: 96%

Comparison of the Refraction Precision Results between Pentacam AXL and IOL Master 700 Using Universal II Barrett Formula after Cataract Surgery

Budiman¹,

Melino²,

Dwi³

et al. 2023

OJOph

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Background: The availability of premium intraocular lenses (IOL), including toric, multifocal, and EDOF, has become very sophisticated and now demands accurate biometric measurement accuracy. The Pentacam AXL and IOL Master 700 are often used for optical biometry and they are available in the market today. They can also be used to measure the parameters needed in the IOL calculation using the latest generation formulas, such as the Barett Universal II. Therefore, this study aims to compare the accuracy of refraction results between Pentacam AXL compared to IOL Master 700 after cataract surgery with the Barett Universal-II formula. Method: A total of 64 eyes from 64 patients who had a preoperative examination with IOL Master 700 and Pentacam AXL were included in this study. Parameters such as K, ACD, LT, WTW, and AL were then compared between the two tools. Prediction error values were also calculated and compared based on the difference between the Spherical equivalent (SE) of subjective refraction results after 4 weeks of surgery with their refractive prediction targets. Results: There was no statistically significant difference in the parameters measured from the two tools except ACD and WTW. Furthermore, LT was difficult to obtain on the Pentacam AXL due to penetration problems, as well as in patients with significant lens opacities. The percentage of error prediction values that reach ± 0.50 D on Pentacam AXL and IOL Master 700 was 70.3% and 73.5%, respectively. However, the average prediction error that was close to emmetropia with IOL Master 700 was greater compared to the other tool. Conclusion: Pentacam AXL has a fairly good accuracy for refraction prediction compared to IOL

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Agreement of Anterior Segment Parameter Measurements With CASIA 2 and IOLMaster 700

Cited by 7 publications

References 29 publications

Agreement of Total Keratometry and Posterior Keratometry Among IOLMaster 700, CASIA2, and Pentacam

Agreement of Total Keratometry and Posterior Keratometry Among IOLMaster 700, CASIA2, and Pentacam

Agreement between a new optical low coherence reflectometry biometer and an anterior segment optical coherence tomographer

Comparison of the Refraction Precision Results between Pentacam AXL and IOL Master 700 Using Universal II Barrett Formula after Cataract Surgery

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