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Abstract：
OBJECTIVE: The purpose of this study was to report the clinical and refractive outcomes of eyes with long axial length (AL) and high myopia that underwent cataract surgery and compare the performance of intraocular lens (IOL) calculation formulae on these eyes.
METHODS: This retrospective cohort included 183 eyes that underwent cataract surgery from January 2010 to December 2018. Demographics, AL, postoperative best-visual acuities, IOL power data, and postoperative complications were recorded. Refractive outcomes were analyzed and absolute predicted errors were compared between five IOL calculation formulas.
RESULTS: The mean age included in the study was 65.4 ± 9.39 years with a mean AL of 26.76 ± 1.75 mm. Postoperatively, the mean sphere, cylinder, and manifest refraction spherical equivalent were 0.22 D ± 0.54, -0.78 D ± 0.50, and - 0.16 D ± 0.50, respectively. The average IOL power implanted was 11.12 D ± 4.59 D. No intraoperative complications were encountered, but there was one incidence of retinal tear with detachment reported postoperatively (0.55%). The Kane formula had the lowest mean absolute predicted error (MAE). A significant positive correlation between increasing AL and MAE was seen in the Sanders, Retzlaff and Kraft-Theoretical (SRK-T) and Ladas formulae but not statistically significant when the Kane, Barrett Universal II, and the Emmetropia Verifying Optical (EVO) formulae were used.
CONCLUSIONS: Cataract surgery in eyes with long ALs and high myopia is safe with a low incidence of intraoperative and postoperative complications. The Kane, Barrett, and EVO formulae were equally accurate in calculating the IOL power and achieved the least amount of residual error postoperatively.
METHODS: This retrospective cohort included 183 eyes that underwent cataract surgery from January 2010 to December 2018. Demographics, AL, postoperative best-visual acuities, IOL power data, and postoperative complications were recorded. Refractive outcomes were analyzed and absolute predicted errors were compared between five IOL calculation formulas.
RESULTS: The mean age included in the study was 65.4 ± 9.39 years with a mean AL of 26.76 ± 1.75 mm. Postoperatively, the mean sphere, cylinder, and manifest refraction spherical equivalent were 0.22 D ± 0.54, -0.78 D ± 0.50, and - 0.16 D ± 0.50, respectively. The average IOL power implanted was 11.12 D ± 4.59 D. No intraoperative complications were encountered, but there was one incidence of retinal tear with detachment reported postoperatively (0.55%). The Kane formula had the lowest mean absolute predicted error (MAE). A significant positive correlation between increasing AL and MAE was seen in the Sanders, Retzlaff and Kraft-Theoretical (SRK-T) and Ladas formulae but not statistically significant when the Kane, Barrett Universal II, and the Emmetropia Verifying Optical (EVO) formulae were used.
CONCLUSIONS: Cataract surgery in eyes with long ALs and high myopia is safe with a low incidence of intraoperative and postoperative complications. The Kane, Barrett, and EVO formulae were equally accurate in calculating the IOL power and achieved the least amount of residual error postoperatively.
摘要：
目的：本研究的目的是报告长眼轴（AL）和高度近视行白内障手术的临床和屈光结果，并比较人工晶状体（IOL）计算公式在这些眼睛上的表现。
方法：该回顾性队列包括2010年1月至2018年12月接受白内障手术的183只眼。人口统计,AL,术后最佳视力，IOL功率数据,记录术后并发症。分析屈光结果，并比较5个IOL计算公式之间的绝对预测误差。
结果：纳入研究的平均年龄为65.4±9.39岁，平均AL为26.76±1.75mm。术后,平均球体，气缸,和明显的折射球面当量分别为0.22D±0.54、-0.78D±0.50和-0.16D±0.50。平均人工晶状体植入功率为11.12D±4.59D，术中无并发症，但术后报告有1例视网膜撕裂伴脱离(0.55%)。凯恩公式具有最低的平均绝对预测误差(MAE)。在Sanders中发现AL和MAE的增加之间存在显着正相关，Retzlaff和卡夫理论(SRK-T)和拉达斯公式，但在Kane时没有统计学意义，巴雷特环球II,并使用了Embometpia验证光学(EVO)公式。
结论：对于高度近视和长眼白内障手术是安全的，术中和术后并发症发生率低。凯恩,巴雷特,和EVO公式在计算IOL功率时同样准确，并且术后残余误差最小。
方法：该回顾性队列包括2010年1月至2018年12月接受白内障手术的183只眼。人口统计,AL,术后最佳视力，IOL功率数据,记录术后并发症。分析屈光结果，并比较5个IOL计算公式之间的绝对预测误差。
结果：纳入研究的平均年龄为65.4±9.39岁，平均AL为26.76±1.75mm。术后,平均球体，气缸,和明显的折射球面当量分别为0.22D±0.54、-0.78D±0.50和-0.16D±0.50。平均人工晶状体植入功率为11.12D±4.59D，术中无并发症，但术后报告有1例视网膜撕裂伴脱离(0.55%)。凯恩公式具有最低的平均绝对预测误差(MAE)。在Sanders中发现AL和MAE的增加之间存在显着正相关，Retzlaff和卡夫理论(SRK-T)和拉达斯公式，但在Kane时没有统计学意义，巴雷特环球II,并使用了Embometpia验证光学(EVO)公式。
结论：对于高度近视和长眼白内障手术是安全的，术中和术后并发症发生率低。凯恩,巴雷特,和EVO公式在计算IOL功率时同样准确，并且术后残余误差最小。
