Accuracy of IOL calculations in children: A comparison of immersion versus contact A-scan biometery
Accuracy of IOL calculations in children: A comparison of immersion versus contact A-scan biometery
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DOI：
10.1016/j.jaapos.2008.03.016
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发表时间：
2008-10-01
期刊：
影响因子：
1.6
通讯作者：
Roberts, Gavin J.
中科院分区：
文献类型：
--
作者：
Ben-Zion, Itay;Neely, Daniel E.;Roberts, Gavin J.
目的 评估全身麻醉下使用浸入式 A 扫描生物测量法计算儿童 IOL 的准确性，并将结果与接触式 A 扫描生物测量法进行比较。 方法 回顾性分析连续 203 例小儿白内障摘除术并在囊袋内植入初次 IOL 的病例；患者平均年龄为 5.52 +/- 4.19 岁（范围，18 天至 18 岁）。使用接触式 A 扫描生物测定法对 138 只眼睛进行眼轴长度测量，而对剩余的连续 65 只眼睛使用浸入式生物测定法。将术前预测目标屈光与术后 2 个月访视时获得的屈光结果进行比较。结果 所有眼睛的晶状体预测误差绝对值与术后所需屈光结果的绝对值平均值为 1.08 +/- 0.93 D。接触式 A 扫描亚组的镜片预测误差为 1.11 +/- 0.90 D，而浸入式 A 扫描亚组的镜片预测误差较小，为 1.03 +/- 0.98 D。该结果不具有统计显着性 (p = 0.6442)。在晶状体预测误差增加与手术时年龄或角膜曲率之间发现了统计学上显着的相关性。结论这项回顾性、非比较性试点研究表明，在儿科 IOL 计算中比较使用浸没式与接触式 A 扫描生物测定法获得的术后屈光结果时，IOL 预测误差没有显着差异。
PURPOSE To evaluate the accuracy of pediatric IOL calculations performed under general anesthesia by using immersion A-scan biometry and to compare the results to those obtained using contact A-scan biometry.METHODS A retrospective review of 203 consecutive cases of pediatric cataract extraction with primary IOL implantation within the capsular bag; mean patient age was 5.52 +/- 4.19 years (range, 18 days to 18 years). Axial length measurements were performed with the contact A-scan biometry in 138 eyes, whereas immersion technique biometry was used in the remaining consecutive 65 eyes. Preoperative predictive target refraction was compared with the refractive result obtained at the 2-month postoperative visit.RESULTS The mean of the absolute value lens prediction error for all eyes was 1.08 +/- 0.93 D from the desired postoperative refractive result. Lens prediction error for the contact A-scan subgroup was 1.11 +/- 0.90 D, whereas the immersion A-scan subgroup was less at 1.03 +/- 0.98 D. This result was not statistically significant (p = 0.6442). Statistically significant correlations were found between increased lens prediction error and age at time of surgery or corneal curvature.CONCLUSIONS This retrospective, noncomparative pilot study showed no significant difference in IOL prediction error when comparing the postoperative refractive results obtained with immersion versus contact A-scan biometry in pediatric IOL calculations.