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| ConsistencyAnalysis of Ocular Biometry Using FAL-1000Aand Lenstar LS 900 |
| Yabin Hu, Wenbin Wei, Changbin Zhai, Li Zhang, Caiyun Fu,Yan Zheng |
| Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Sciences Key Laboratory, Medical Artificial Intelligence Research and Verification Key Laboratory of the Ministry of Industry and Information Technology, Beijing 100730, China |
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Abstract Objective: To evaluate the consistency of optical biometric parameters of adult subjects with refractive error measured by FAL-1000A and Lenstar LS 900. Methods: In this case series study, 386 subjects (386 eyes) who planned to receive refractive surgery and met the enrollment criteria were recruited between August and September 2022 in the Beijing Tongren Eye Center. Axial length (AL), fat meridian keratometry (K1), steep meridian keratometry (K2), mean keratometry (Km), axial length/radii of corneal curvature (AL/CR) were measured using FAL-1000Aand Lenstar LS 900. The difference, correlation, and agreement between the two instruments were analyzed by paired t-test, Pearson's correlation coeffcient, and Bland-Altman plot, respectively. Results: AL, K1, K2, and AL/CR measured with FAL-1000Awere signifcantly lower than that measured with Lenstar LS 900 (all P<0.05). There was a good correlation for AL, K1, K2, Km, and AL/CR between two devices (r=0.98, 0.98, 0.98, 0.99, 0.97, all P<0.001). Bland-Altman analysis showed 95% limits of agreement (LoA) were -0.247-0.164 mm, -0.366-0.529, -0.689-0.454, -0.412-0.372, -0.067-0.054 for AL, K1, K2, Km and AL/CR, respectively. And there were 3.6%, 3.9%, 3.6%, 4.1%, and 3.1% points ofAL, K1, K2, Km, andAL/CR outside the 95%LOA, indicating good consistency of these two devices. Conclusions: As a domestic optical biometric measurement instrument, FAL-1000Ashowed a good agreement in measuring AL, K1, K2, Km, and AL/CR compared with Lenstar LS 900, and could be used for the evaluation of ocular biometry parameters in refractive error patients.
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Received: 18 December 2022
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| Fund:Science&Technology Project of Beijing Municipal Science&Technology Commission (Z201100005520043, Z201100005520045) |
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Corresponding Authors:
Wenbin Wei, Email: tr_weiwenbin@163.com
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| [1] |
. [J]. Chinese Journal of Optometry Ophthalmology and Visual science, 2023, 25(9): 0-. |
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