PURPOSE To evaluate the precision of bag-in-the-lens intraocular lens (BIL IOL) power calculation in different age groups of pediatric cataract patients. SETTINGS Department of Ophthalmology, Justus-Liebig-University Giessen, University Hospital Giessen and Marburg GmbH, Campus Giessen, Giessen, Germany. DESIGN Retrospective nonrandomized consecutive case series. METHODS Pediatric patients diagnosed with cataract and operated with BIL IOL implantation were divided into 4 age groups: Group 1 (0 to 3 months), Group 2 (>3 months, <12 months), Group 3 (12 to 36 months), and Group 4 (>36 months to 17 years). BIL IOL power was calculated with the SRK/T formula. The prediction error (PE) was defined as the absolute difference between the preoperative selected target and postoperative achieved refraction. The impact of age at the time of surgery, axial length (AL), keratometry, and corneal astigmatism on PE was analyzed. RESULTS The study comprised 87 eyes of 56 pediatric patients. The mean and median PEs for the entire group were 1.79 diopters (D) and 1.23 D, respectively. The mean PE in each age group was: 3.43 D in Group 1, 2.14 D in Group 2, 1.60 D in Group 3, and 1.33 D in Group 4. The mean PE in eyes with ALs shorter than 20 mm was 2.67 D, and 1.44 D in eyes with an AL of 20 mm or longer. The mean PE in eyes with corneal radii less than 7.3 mm was 2.45 D, and 1.66 D in eyes with corneal radii of 7.3 mm or more. In the age and AL subgroups, the PE differences were statistically significant (P < .05). CONCLUSIONS The PE was larger in the youngest study group, and it decreased gradually with age and in eyes with ALs shorter than 20 mm. The PE has to be considered during BIL IOL power calculation in children.

中文翻译：

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小儿白内障患者不同年龄组的隐形眼镜人工晶状体屈光力计算的精确度：吉森小儿白内障研究小组的报告。

目的评估儿童白内障患者不同年龄组的眼镜袋人工晶状体（BIL IOL）屈光度计算的准确性。地点吉森贾斯图斯-利比希大学大学眼科，吉森大学医院和马尔堡有限公司，德国吉森校园。设计回顾性非随机连续案例系列。方法将被诊断为白内障并经BIL IOL植入手术的小儿患者分为4个年龄组：第1组（0至3个月），第2组（> 3个月，<12个月），第3组（12至36个月）和第4组（> 36个月至17岁）。使用SRK / T公式计算BIL IOL能力。预测误差（PE）定义为术前所选目标与术后获得的屈光度之间的绝对差。分析了手术时的年龄，轴向长度（AL），角膜塑形术和角膜散光对PE的影响。结果该研究包括56名儿科患者的87只眼。整个组的平均PE分别为1.79屈光度（D）和1.23D。每个年龄组的平均PE为：第1组为3.43 D，第2组为2.14 D，第3组为1.60 D，第4组为1.33D。AL小于20 mm的眼睛的平均PE为2.67 D， AL为20 mm或更长的眼睛的1.44D。角膜半径小于7.3 mm的眼睛的平均PE为2.45 D，角膜半径为7.3 mm或更大的眼睛的平均PE为1.66D。在年龄和AL亚组中，PE差异具有统计学意义（P <.05）。结论在最年轻的研究组中，PE较大，并且随着年龄的增长和AL短于20 mm的眼睛，其PE逐渐降低。