Regional comparison of preoperative biometry for cataract surgery between two domestic institutions
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ORIGINAL PAPER
Regional comparison of preoperative biometry for cataract surgery between two domestic institutions Kazutaka Kamiya . Fusako Fujimura . Kei Iijima . Shoji Nobuyuki . Yosai Mori . Kazunori Miyata
Received: 18 March 2020 / Accepted: 20 June 2020 Ó Springer Nature B.V. 2020
Abstract Purpose Regional variations of the preoperative biometry can affect the refractive accuracy of cataract surgery. We aimed to compare the preoperative biometric data for cataract surgery between two domestic institutions. Methods We retrospectively reviewed the preoperative biometric data of 673 consecutive eyes undergoing standard cataract surgery at Miyata Eye Hospital (Miyazaki; M group) and Kitasato University Hospital (Kanagawa; K group), and compared these data between the two groups. Results We found significant differences in the mean keratometric readings (44.39 ± 1.56 D vs. 44.09 ± 1.74 D) (unpaired t test, p = 0.034), the anterior chamber depth (3.14 ± 0.43 mm vs. 3.46 ± 0.62 mm) (p \ 0.001), the axial length (23.98 ± 1.62 mm vs. 24.59 ± 1.82 mm) (p \ 0.001), and the lens thickness
(4.64 ± 0.48 mm vs. 4.37 ± 0.62 mm) (p \ 0.001), in the M and K groups, respectively. Otherwise, we found no significant differences in corneal astigmatism (p = 0.104), or central corneal thickness (p = 0.480) between the two groups. For subgroup analysis, the prediction error (0.06 ± 0.47 D) in the M group was significantly more hyperopic than that (- 0.09 ± 0.54 D) in the K group (p = 0.006). Conclusions There were significant differences in the mean keratometric readings, the anterior chamber depth, the axial length, and the lens thickness, by approximately 0.3 D, 0.3 mm, 0.6 mm, and 0.3 mm, respectively. Regional variations of the preoperative biometry did exist to some extent, and were not clinically negligible, in consideration of the precise IOL power calculation and the subsequent refractive accuracy of cataract surgery. Trial registration University Hospital Medical Information Network Clinical Trial Registry (000037994).
K. Kamiya (&) F. Fujimura Visual Physiology, School of Allied Health Sciences, Kitasato University, Sagamihara, Kanagawa, Japan e-mail: [email protected]
Keywords Biometry Keratometry Anterior chamber depth Axial length Lens thickness Cataract surgery
K. Iijima S. Nobuyuki Department of Ophthalmology, School of Medicine, Kitasato University, Sagamihara, Kanagawa, Japan
Introduction
Y. Mori K. Miyata Department of Ophthalmology, Miyata Eye Hospital, Miyakonojo, Miyazaki, Japan
Cataract surgery has been widely recognized as one of the refractive surgeries to correct refractive errors as
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Int Ophthalmol
much as possible. Precise preoperative biometry as well as optimized intraocular lens (IOL) power calculation is mandatory in order to further improve the refractive accuracy of cataract surgery. Although the predictability of cataract surgery has much improved by the use of the optical biometry and the newest-generation IOL power
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