Joint Shantou International Eye Center of Shantou University and The Chinese University of Hong Kong, North Dongxia Road, Shantou, 515041, Guangdong, China.
Shantou University Medical College, Shantou, Guangdong, China.
Int Ophthalmol. 2022 Jul;42(7):2029-2038. doi: 10.1007/s10792-021-02194-1. Epub 2022 May 10.
To evaluate and compare the accuracy of six different formulas (Emmetropia Verifying Optical version 2.0, Kane, SRK/T, Barrett Universal II, Haigis and Olsen) in intraocular lens (IOL) power calculation for extremely long eyes.
Retrospective case-series. Seventy-three eyes with axial length (AL) ≥ 29.0 mm and underwent phacoemulsification cataract surgery with Rayner (Hove, UK) 920H IOL implantation from January 2018 to March 2020 were included. Prediction errors (PE) were calculated and compared between different formulas to evaluate the accuracy of formulas. Multiple regression analysis was performed to investigate factors associated with the PE.
The Kane formula had mean prediction error close to zero (- 0.01 ± 0.51 D, P = 0.841), whereas the EVO 2.0, SRK/T, Barrett Universal II, Haigis and Olsen formulas produced hyperopic outcomes (all P < 0.001). The median absolute error [inter-quartile range] produced by the EVO 2.0, Kane, Barrett Universal II and Olsen formulas showed no significant difference (0.33 D [0.48], 0.30 D [0.44], 0.34 D [0.39], 0.29 D [0.37], respectively, pairwise comparison P > 0.05), but was significantly lower than that of the SRK/T and Haigis formulas (0.85 D [0.66], 0.80 D [0.54], respectively, pairwise comparison P < 0.001). The AL and the PE produced by the SRK/T formula were significantly positively correlated in extremely myopic eyes (β = 0.248, P < 0.001), whereas the trend was not demonstrated in other formulas.
For cataract patients with axial length greater than 29.0 mm, the accuracy of the EVO 2.0, Kane, Barrett Universal II and Olsen formulas is comparable and significantly better than that of the SRK/T and Haigis formulas.
评估和比较 6 种不同公式（Emmetropia Verifying Optical 版本 2.0、Kane、SRK/T、Barrett Universal II、Haigis 和 Olsen）在计算超长眼人工晶状体（IOL）度数中的准确性。
回顾性病例系列研究。纳入 2018 年 1 月至 2020 年 3 月期间因眼轴（AL）≥29.0mm 而接受白内障超声乳化吸除术联合 Rayner（英国霍夫）920H IOL 植入术的 73 例患者。计算不同公式之间的预测误差（PE），并比较以评估公式的准确性。进行多元回归分析以探讨与 PE 相关的因素。
Kane 公式的平均预测误差接近零（-0.01±0.51 D，P=0.841），而 EVO 2.0、SRK/T、Barrett Universal II、Haigis 和 Olsen 公式则产生远视结果（均 P<0.001）。EVO 2.0、Kane、Barrett Universal II 和 Olsen 公式的中位数绝对误差[四分位间距]无显著差异（0.33 D[0.48]、0.30 D[0.44]、0.34 D[0.39]、0.29 D[0.37]，两两比较 P>0.05），但显著低于 SRK/T 和 Haigis 公式（0.85 D[0.66]、0.80 D[0.54]，两两比较 P<0.001）。SRK/T 公式的眼轴长度（AL）和预测误差（PE）在极度近视眼中呈显著正相关（β=0.248，P<0.001），而在其他公式中则没有表现出这种趋势。
对于眼轴长度大于 29.0mm 的白内障患者，EVO 2.0、Kane、Barrett Universal II 和 Olsen 公式的准确性相当，明显优于 SRK/T 和 Haigis 公式。
