Ophthalmology Department, Centro Hospitalar Leiria, Rua das Olhalvas, 2410-197, Leiria, Portugal.
Sci Rep. 2021 Jan 14;11(1):1449. doi: 10.1038/s41598-021-81146-2.
Analysis of refractive outcomes, using biometry data collected with a new biometer (Pentacam-AXL, OCULUS, Germany) and a reference biometer (Lenstar LS 900, HAAG-STREIT AG, Switzerland), in order to assess differences in the predicted and actual refraction using different formulas. Prospective, institutional study, in which intraocular lens (IOL) calculation was performed using the Haigis, SRK/T and Hoffer Q formulas with the two systems in patients undergoing cataract surgery between November 2016 and August 2017. Four to 6 weeks after surgery, the spherical equivalent (SE) was derived from objective refraction. Mean prediction error (PE), mean absolute error (MAE) and the median absolute error (MedAE) were calculated. The percentage of eyes within ± 0.25, ± 0.50, ± 1.00, and ± 2.00 D of MAE was determined. 104 eyes from 76 patients, 35 males (46.1%), underwent uneventful phacoemulsification with IOL implantation. Mean SE after surgery was - 0.29 ± 0.46 D. Mean prediction error (PE) using the SRK/T, Haigis and Hoffer Q formulas with the Lenstar was significantly different (p > 0.0001) from PE calculated with the Pentacam in all three formulas. Percentage of eyes within ± 0.25 D MAE were larger with the Lenstar device, using all three formulas. The difference between the actual refractive error and the predicted refractive error is consistently lower when using Lenstar. The Pentacam-AXL user should be alert to the critical necessity of constant optimization in order to obtain optimal refractive results.
使用新的生物测量仪（德国 Oculus 的 Pentacam-AXL）和参考生物测量仪（瑞士 Haag-Streit AG 的 Lenstar LS 900）收集的生物测量数据进行屈光结果分析，以评估使用不同公式预测和实际屈光的差异。这是一项前瞻性的机构研究，在 2016 年 11 月至 2017 年 8 月期间，对接受白内障手术的患者，使用 Haigis、SRK/T 和 Hoffer Q 公式，通过这两个系统对人工晶状体（IOL）进行计算。术后 4 至 6 周，从客观折射中得出球镜等效值（SE）。计算平均预测误差（PE）、平均绝对误差（MAE）和中值绝对误差（MedAE）。确定 MAE 误差在±0.25、±0.50、±1.00 和±2.00 D 的眼数百分比。纳入 76 例 104 只眼，其中 35 例为男性（46.1%），行超声乳化白内障吸除术联合人工晶状体植入术。术后平均 SE 为-0.29±0.46 D。使用 Lenstar 的 SRK/T、Haigis 和 Hoffer Q 公式计算的平均预测误差（PE）与使用 Pentacam 计算的所有三个公式的 PE 显著不同（p>0.0001）。使用所有三个公式，Lenstar 设备得出的 MAE 误差在±0.25 D 范围内的眼数比例更大。使用 Lenstar 时，实际屈光误差与预测屈光误差的差值始终较低。Pentacam-AXL 用户应注意不断优化的重要性，以获得最佳的屈光结果。
