Yao Yunqian, Zhao Jing, Yu Jifeng, He Wenwen, Wei Ling, Zhou Xingtao, Lu Yi, Zhu Xiangjia
Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, 83 Fenyang Road, Shanghai, 200031, China.
National Health Center Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China.
Eye Vis (Lond). 2022 Jul 1;9(1):23. doi: 10.1186/s40662-022-00295-1.
To evaluate the influence of corneal ablation patterns on the prediction error after cataract surgery in post-myopic-LASIK eyes.
Eighty-three post-myopic-LASIK eyes of 83 patients that underwent uneventful cataract surgery were retrospectively included. Predicted postoperative spherical equivalence (SE) was calculated for the implanted lens using the Haigis-L and Barrett True-K formula. Prediction error at one month postsurgery was calculated as actual SE minus predicted SE. For each eye, area and decentration of the ablation zone was measured using the tangential curvature map. The associations between prediction errors and corneal ablation patterns were investigated.
The mean prediction error was - 0.83 ± 1.00 D with the Haigis-L formula and - 1.00 ± 0.99 D with the Barrett True-K formula. Prediction error was positively correlated with keratometry (K) value and negatively correlated with ablation zone area using either formula, and negatively correlated with decentration of the ablation zone using the Barrett True-K formula (all P < 0.05). In the K < 37.08 D group, prediction error was negatively correlated with decentration of the ablation zone with both formulas (all P < 0.05). Multivariate analysis showed that with the Haigis-L formula, prediction error was associated with axial length (AL), K value and decentration, and with the Barrett True-K formula, prediction error was associated with AL and decentration (all P < 0.05).
A flatter cornea, larger corneal ablation zone and greater decentration will lead to more myopic prediction error after cataract surgery in post-myopic-LASIK eyes.
评估角膜切削模式对近视性准分子原位角膜磨镶术（LASIK）术后白内障手术预测误差的影响。
回顾性纳入83例接受了顺利白内障手术的近视性LASIK术后患者的83只眼。使用Haigis-L和Barrett True-K公式计算植入晶状体的术后预测等效球镜度（SE）。术后1个月的预测误差计算为实际SE减去预测SE。对于每只眼，使用切线曲率图测量切削区的面积和偏心度。研究预测误差与角膜切削模式之间的关联。
使用Haigis-L公式时平均预测误差为-0.83±1.00 D，使用Barrett True-K公式时为-1.00±0.99 D。使用任一公式，预测误差均与角膜曲率计（K）值呈正相关，与切削区面积呈负相关，使用Barrett True-K公式时与切削区偏心度呈负相关（所有P<0.05）。在K<37.08 D组中，使用两种公式时预测误差均与切削区偏心度呈负相关（所有P<0.05）。多因素分析显示，使用Haigis-L公式时，预测误差与眼轴长度（AL）、K值和偏心度相关，使用Barrett True-K公式时，预测误差与AL和偏心度相关（所有P<0.05）。
更平坦的角膜、更大的角膜切削区和更大的偏心度会导致近视性LASIK术后白内障手术的近视预测误差更大。
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