International Vision Correction Research Centre, Department of Ophthalmology, University of Heidelberg, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
J Cataract Refract Surg. 2010 Feb;36(2):230-4. doi: 10.1016/j.jcrs.2009.09.016.
To evaluate intraocular lens (IOL) power calculation using a new optical low-coherence reflectometry (OLCR) biometer and compare the results with those obtained with a partial coherence interferometry (PCI) optical biometer.
International Vision Correction Research Centre, Department of Ophthalmology, University of Heidelberg, Heidelberg, Germany.
Biometry measurements in eyes of cataract patients were performed by the same examiner with an OLCR biometer (Lenstar LS 900/Allegro Biograph) and a PCI optical biometer (IOLMaster). After determination of axial length (AL), corneal radii values by keratometry (R1 and R2), and anterior chamber depth (ACD), power calculation for an AcrySof MA60AC IOL was compared between the 2 devices using 4 formulas and the corresponding IOL constants. The target was emmetropia.
One hundred eyes of 100 cataract patients (mean age 70.0 years +/- 10.6 [SD]) were measured. Of the biometry parameters, the only statistically significant differences between the 2 devices were in R2 (mean difference 0.02 +/- 0.05 mm), (R1 + R2)/2 (mean difference 0.01 +/- 0.04 mm), and ACD (mean difference 0.05 +/- 0.11 mm) (P<.01, Wilcoxon test). The mean differences in IOL power calculations using the 4 formulas were not statistically significant between the 2 devices (P>.01, Wilcoxon test).
The OLCR biometry device provided precise and valid measurements and thus can be used for the preoperative examination of cataract patients.
评估新型光学低相干反射仪（OLCR）生物测量仪的人工晶状体（IOL）计算能力，并与部分相干干涉仪（PCI）光学生物测量仪的结果进行比较。
德国海德堡大学眼科国际视力矫正研究中心。
由同一位检查者使用 OLCR 生物测量仪（Lenstar LS 900/Allegro Biograph）和 PCI 光学生物测量仪（IOLMaster）对白内障患者的眼部进行生物测量。在确定眼轴（AL）、角膜曲率计（R1 和 R2）的角膜半径值以及前房深度（ACD）后，使用 4 种公式和相应的 IOL 常数，对 2 种设备计算 AcrySof MA60AC IOL 的屈光力进行比较。目标是正视。
共测量了 100 例白内障患者（100 只眼，平均年龄 70.0 岁 +/- 10.6 [标准差]）的眼部。在这 2 种设备中，只有角膜半径值 R2（平均差异 0.02 +/- 0.05 毫米）、（R1 + R2）/2（平均差异 0.01 +/- 0.04 毫米）和 ACD（平均差异 0.05 +/- 0.11 毫米）存在统计学上的显著差异（P<.01，Wilcoxon 检验）。在使用 4 种公式进行 IOL 屈光力计算方面，2 种设备之间的平均差异无统计学意义（P>.01，Wilcoxon 检验）。
OLCR 生物测量仪提供了精确有效的测量结果，因此可用于白内障患者的术前检查。
