Development and Verification of an Adjustment Factor for Determining the Axial Length Using Optical Biometry in Silicone Oil-Filled Eyes

Auffarth, Gerd U.; Naujokaitis, Tadas; Blöck, Louise; Daghbashyan, Anna; Meis, Jan; Augustin, Victor A; Khoramnia, Ramin; Yildirim, Timur M.

doi:10.3390/diagnostics12010163

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…Measuring AL in SO-lled eyes brings additional challenges: artifacts caused by oil droplets may complicate the measurement, and insu cient SO lling in different degrees may lead to deviations in the results, especially in ultrasound biometry where patients are in a prone position 7,21 . CoV can be used to indicate the accuracy and repeatability of measurement 22 . The lower the CoV value, the higher the precision.…”

Section: Discussionmentioning

confidence: 99%

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Comparison of ocular biometry obtained with Tomey OA-2000 and IOLMaster 700 in silicone oil-filled eyes

Xiong

Lin

Zhao

et al. 2022

Preprint

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Purpose To evaluate a new non-contact instrument (OA-2000) measuring the ocular biometry parameters of silicone oil (SO)-filled aphakia eyes, as compared with IOLMaster 700. Methods Forty SO-filled aphakia eyes of 40 patients were enrolled in this cross-sectional clinical trial. The axial length (AL), central corneal thickness (CCT), keratometry (Kf [flattest keratometry] and Ks [steep keratometry, 90° apart from Kf]), and axis of the Kf (Ax1) measured with OA-2000 were compared with those measured with IOLMaster 700. The agreements of the results between the two devices were evaluated by Bland-Altman analysis. The differences of measurement results were evaluated by paired t test, and the correlation was evaluated by the Pearson coefficient. Results The mean AL obtained with the OA-2000 was 23.57 ± 0.93mm (range: 21.50 to 25.68mm), and that obtained with the IOLMaster 700 was 23.69 ± 0.94mm (range: 21.85 to 25.86mm), resulting in a mean offset of 0.124 ± 0.125mm (p < 0.001). The AL obtained with the two devices showed a strong linear correlation (r = 0.991). It was also found that the Kf, Ks and Ax1had excellent correlation (Kf, r = 0.980; Ks, r = 0.987; and Ax1, r = 0.966). There was no statistical significance in the pair t test of the Kf, Ks and Ax1. The CCT obtained with the OA-2000 was 530.7 ± 30.9µm (range: 470 to 578µm), and that obtained with the IOLMaster 700 was 545.3 ± 33.9µm (range: 479 to 600µm). The average offset was 14.6 ± 7.5µm, p < 0.001. The coefficient of variations of the biometric parameters obtained with the two devices were lower than 1% except for the Ax1. Conclusion In SO-filled aphakia eyes, the ocular biometry obtained with the OA-2000 and IOLMaster 700 has good correlation and consistency. OA-2000 is an accurate instrument that can provide fundus surgeons with the interesting information on ocular biological parameters of SO-filled aphakia eyes.

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Section: Discussionmentioning

confidence: 99%

“…The lower the CoV value, the higher the precision. Auffarth et al 22 used Pentacam AXL and IOLMaster 700 to measure the AL of pseudophakic SO-lled eyes. Their research showed that the CoV of Pentacam AXL and IOLMaster 700 were 0.26% and 0.09% respectively.…”

Section: Discussionmentioning

confidence: 99%

Comparison of ocular biometry obtained with Tomey OA-2000 and IOLMaster 700 in silicone oil-filled eyes

Xiong

Lin

Zhao

et al. 2022

Preprint

View full text Add to dashboard Cite

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Evaluation and Management of Postoperative Complications Following Cataract Extraction and Intraocular Lens Placement

Linaburg,

Cui,

Armenti

2024

Advances in Ophthalmology and Optometry

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Evaluation and comparison of ocular biometric parameters obtained with Tomey OA-2000 in silicone oil-filled aphakic eyes

et al. 2023

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Purpose To evaluate a new non-contact instrument (OA-2000) measuring the ocular biometry parameters of silicone oil (SO)-filled aphakic eyes, as compared with IOLMaster 700. Methods Forty SO-filled aphakic eyes of 40 patients were enrolled in this cross-sectional clinical trial. The axial length (AL), central corneal thickness (CCT), keratometry ((flattest keratometry) Kf and (steep keratometry, 90° apart from Kf) Ks), and axis of the Kf (Ax1) were measured with OA-2000 and IOLMaster 700. The coefficient of variation (CoV) was calculated to assess the repeatability. The correlation was evaluated by the Pearson coefficient. Bland-Altman analysis and paired t test were used to analyze the agreements and differences of parameters measured by the two devices, respectively. Results The mean AL obtained with the OA-2000 was 23.57 ± 0.93 mm (range: 21.50 to 25.68 mm), and that obtained with the IOLMaster 700 was 23.69 ± 0.94 mm (range: 21.85 to 25.86 mm), resulting in a mean offset of 0.124 ± 0.125 mm (p < 0.001). The mean offset of CCT measured by OA-2000 and IOLMaster 700 was 14.6 ± 7.5 μm (p < 0.001). However, the Kf, Ks and Ax1 values from the two devices were comparable (p > 0.05). All the measured parameters of the two devices showed strong linear correlations (all r ≥ 0.966). The Bland-Altman analysis showed a narrow 95% limits of agreement (LoA) of Kf, Ks and AL, but 95%LoA of CCT and Ax1 was wide, which were − 29.3 ~ 0.1 μm and-25.9 ~ 30.7°respectively. The CoVs of the biometric parameters obtained with OA-2000 were lower than 1%. Conclusion In SO-filled aphakic eyes, the ocular parameters (including AL, Kf, Ks, Ax1, and CCT) measured by the OA-2000 and IOLMaster 700 had a good correlation. Two devices had an excellent agreement on ocular biometric measurements of Kf, Ks and AL. The OA-2000 provided excellent repeatability of ocular parameters in SO-filled aphakic eyes.

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Development and Verification of an Adjustment Factor for Determining the Axial Length Using Optical Biometry in Silicone Oil-Filled Eyes

Cited by 3 publications

References 21 publications

Comparison of ocular biometry obtained with Tomey OA-2000 and IOLMaster 700 in silicone oil-filled eyes

Comparison of ocular biometry obtained with Tomey OA-2000 and IOLMaster 700 in silicone oil-filled eyes

Evaluation and Management of Postoperative Complications Following Cataract Extraction and Intraocular Lens Placement

Evaluation and comparison of ocular biometric parameters obtained with Tomey OA-2000 in silicone oil-filled aphakic eyes

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