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01.12.2024 | Original Paper

Improving the accuracy of the SRK/T formula in Chinese with implanting less than 10 D IOL calculated by the SRK/T formula: the SRK/T-Li formula

verfasst von: Shaowei Li, Xinxin Li, Weiyan Liang, Zheming Wu, Yanhong Jia, Yanran Ma, Ling Chu, Tianru Jin, Li Li, Qiumei Li, Ming Qin

Erschienen in: International Ophthalmology | Ausgabe 1/2024

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Abstract

Purpose

To explore the accuracy of the improved SRK/T-Li formula in eyes following implantation of intraocular lens (IOL) of less than 10 D as calculated by using the SRK/T formula in Chinese.

Methods

A total of 489 eyes from 489 patients with cataracts were included in this study. These patients were divided into a training set (271 patients) and a testing set (218 patients). The IOL power calculated by using SRK/T was less than 10 D. We evaluated the accuracy of the modified SRK/T-Li formula (P = P_SRK/T × 0.8 + 2 (P = implanted IOL power; P_SRK/T = IOL power calculated by SRK/T)). We evaluated the mean absolute error (MAE), percentage of prediction error (PE) within ± 0.25, ± 0.50, and ± 1.00 D, and the percentage of postoperative hyperopia.

Results

The MAE values in order of lowest to highest were as follows: 0.412 D (SRK/T-Li), 0.414 D (Barrett Universal II, (BUII)), 0.814 D (SRK/T), and 1.039 D (Holladay 1). The percentage of PE within ± 0.25 D, ± 0.50 D, and ± 1.00 D was 38.99%, 69.27% and 92.66% (BUII), 40.83%, 69.27% and 94.04% (SRK/T-Li), 20.64%, 41.28% and 71.56% (SRK/T), and 7.34%, 16.51% and 53.21% (Holladay 1), respectively. SRK/T-Li had the smallest postoperative hyperopic shift.

Conclusions

For Chinese patients with an IOL power of less than 10 D as calculated by using the SRK/T, the SRK/T-Li has good accuracy and is the best choice to reduce postoperative hyperopic shift.

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Titel: Improving the accuracy of the SRK/T formula in Chinese with implanting less than 10 D IOL calculated by the SRK/T formula: the SRK/T-Li formula
verfasst von: Shaowei Li
Xinxin Li
Weiyan Liang
Zheming Wu
Yanhong Jia
Yanran Ma
Ling Chu
Tianru Jin
Li Li
Qiumei Li
Ming Qin
Publikationsdatum: 01.12.2024
Verlag: Springer Netherlands
Erschienen in: International Ophthalmology / Ausgabe 1/2024
Print ISSN: 0165-5701
Elektronische ISSN: 1573-2630
DOI: https://doi.org/10.1007/s10792-024-03040-w

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Springer Medizin

Improving the accuracy of the SRK/T formula in Chinese with implanting less than 10 D IOL calculated by the SRK/T formula: the SRK/T-Li formula

Abstract

Purpose

Methods

Results

Conclusions

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Abstract

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Methods

Results

Conclusions

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