Universal Eye Center, Zhong-Li, Taipei City, 10660, Taiwan.
Department of Optometry, Central Taiwan University of Science and Technology, Taichung, 40601, Taiwan.
Sci Rep. 2023 Sep 2;13(1):14447. doi: 10.1038/s41598-023-41720-2.
The study aimed to compare the accuracy of intraocular lens (IOL) calculation to predict postoperative refraction by Optiwave Refractive Analysis (ORA), Lenstar LS 900, and the surgeon's Modify method in normal Asian eyes. The IOL power of the Lenstar group was calculated according to Lenstar LS 900, whereas the surgeon's Modify group used topography, axial length (AL) of Lenstar, and Barrett Universal II online formula. Intraoperative aphakic measurements and IOL power calculations were obtained with the ORA system. From the results acquired through Lenstar, Modify, and ORA, the surgeon used his judgment to select the actual IOL power. Postoperative manifest refraction spherical equivalent (MRSE) was obtained 2 months after surgery. The prediction error (PE) was calculated as the difference between the postoperative MRSE and the target refraction proposed by three methods. AL, anterior chamber depth (ACD, measured from corneal endothelium to lens), lens thickness (LT), and ACD + 1/2LT were also included in the survey. In 67 eyes, the average real PE was smaller for the Lenstar (0.06 ± 0.44) and Modify (- 0.05 ± 0.40) than for the ORA group (- 0.25 ± 0.60, p < 0.05). The ORA system demonstrated the best results of IOL power selection in eyes with a normal range of ACD + 0.5 LT (5.2-5.6 mm) in Asian eyes.
本研究旨在比较三种方法（即 Optiwave 屈光分析（ORA）、Lenstar LS 900 和术者修正法）预测正常亚洲人眼术后屈光度的准确性，这些方法通过计算人工晶状体（IOL）的屈光力来实现。Lenstar 组的 IOL 屈光力是根据 Lenstar LS 900 计算得出的，而术者修正组则使用了地形图、Lenstar 的眼轴（AL）和 Barrett Universal II 在线公式。ORA 系统用于获取术中无晶状体眼测量值和 IOL 屈光力计算值。通过 Lenstar、Modify 和 ORA 获得的结果，术者根据自己的判断选择实际的 IOL 屈光力。术后 2 个月获得了远视力（MRSE）。预测误差（PE）是通过三种方法得出的术后 MRSE 与目标屈光度之间的差异计算出来的。眼轴（AL）、前房深度（ACD，从角膜内皮到晶状体测量）、晶状体厚度（LT）和 ACD+1/2LT 也包括在调查中。在 67 只眼中，Lenstar（0.06±0.44）和 Modify（-0.05±0.40）组的平均实际 PE 均小于 ORA 组（-0.25±0.60，p<0.05）。在 ACD+0.5 LT（5.2-5.6mm）正常范围内的亚洲人眼中，ORA 系统在选择 IOL 屈光力方面的表现最佳。
