Department of Ophthalmology, Faculty of Medicine, Yüksek Ihtisas University, Ankara, Turkey.
Department of Ophthalmology, Faculty of Medicine, Başkent University, Ankara, Turkey.
Int Ophthalmol. 2021 Jun;41(6):2205-2212. doi: 10.1007/s10792-021-01781-6. Epub 2021 Mar 17.
This study aims to compare postoperative refractive error results using Pentacam (Oculus Optikgeräte GmbH) Holladay equivalent keratometry readings (EKR) or IOLMaster 700 (Carl Zeiss Meditec AG) keratometry (K) values in IOL power calculation.
This retrospective study included 54 eyes of 31 patients who underwent cataract surgery. Preoperative biometric measurements of all patients were obtained using IOLMaster 700 followed by Pentacam measurements. IOLMaster 700 K measurements on horizontal (K1) and vertical (K2) axes and EKR measurements on 2 mm (EKR2mm), 3 mm (EKR3mm) and 4.5 mm (EKR4.5 mm) corneal zones were recorded. EKR4.5 mm value and IOLMaster 700 K values were used in Holladay-II, SRK/T, Haigis, and Hoffer-Q formulas to calculate predictive refractive error (PRE). Absolute refractive error (ARE) was calculated as the absolute difference between actual postoperative refractive error (APRE) and PRE values.
Mean age was 72.2 ± 8.3 (51-87) years and mean IOL power was 21.5 ± 2.9 D (18-23 D). There was no significant difference between PRE values when IOLMaster 700 K measurements and EKR4.5 mm K measurements were used in Holladay-II, SRK/T, Haigis, and Hoffer-Q formulas (p = 0.571, p = 0.833, p = 0.165, p = 0.347, respectively). There was no significant difference between APRE and ARE values (p = 0.124). According to mean ARE results, the closest estimate was achieved when the IOLMaster 700 K values were used in the Holladay-II formula (p = 0.271).
IOLMaster 700 K measurement and Pentacam EKR4.5 mm measurements can be used interchangeably. IOLMaster 700 K values yielded the most predictive measurement of the refractive result using the Holladay-II formula.
本研究旨在比较使用 Pentacam（Oculus Optikgeräte GmbH）Holladay 等效角膜曲率读数（EKR）或 IOLMaster 700（卡尔蔡司 Meditec AG）角膜曲率（K）值进行 IOL 屈光力计算时的术后屈光误差结果。
本回顾性研究纳入了 31 例 54 只眼的白内障手术患者。所有患者均使用 IOLMaster 700 进行术前生物测量，随后使用 Pentacam 进行测量。记录 IOLMaster 700 在水平（K1）和垂直（K2）轴上的 K 值和 EKR 在 2mm（EKR2mm）、3mm（EKR3mm）和 4.5mm（EKR4.5mm）角膜区域的测量值。使用 EKR4.5mm 值和 IOLMaster 700 K 值，根据 Holladay-II、SRK/T、Haigis 和 Hoffer-Q 公式计算预测屈光误差（PRE）。绝对屈光误差（ARE）为实际术后屈光误差（APRE）与 PRE 值之间的绝对差值。
平均年龄为 72.2±8.3（51-87）岁，平均 IOL 度数为 21.5±2.9D（18-23D）。当使用 Holladay-II、SRK/T、Haigis 和 Hoffer-Q 公式时，IOLMaster 700 K 测量值与 EKR4.5mm K 测量值之间的 PRE 值无显著差异（p=0.571、p=0.833、p=0.165、p=0.347）。APRE 和 ARE 值无显著差异（p=0.124）。根据平均 ARE 结果，使用 Holladay-II 公式时，IOLMaster 700 K 值的估计最接近（p=0.271）。
IOLMaster 700 K 测量值和 Pentacam EKR4.5mm 测量值可互换使用。使用 Holladay-II 公式时，IOLMaster 700 K 值对屈光结果的预测性测量最准确。
