Miyamoto Sumitaka, Kamiya Kazutaka
Aira Miyamoto Eye Clinic, Kagoshima 899-5213, Japan.
Visual Physiology, School of Allied Health Sciences, Kitasato University, Kanagawa 252-0373, Japan.
J Clin Med. 2024 Aug 8;13(16):4639. doi: 10.3390/jcm13164639.
This study aims to verify the accuracy of a new calculation formula, Barrett true axial length formula (T-AL), and the optimized lens factor (LF) for predicting postoperative refraction after cataract surgery. We included 156 Japanese patients who underwent cataract surgery using Clareon monofocal intraocular lenses at our clinic between January 2022 and June 2023. Postoperative spherical equivalent was calculated using subjective refraction values obtained 1 month post-surgery. The LFs were optimized so that the mean prediction error (PE) of each calculation formula was zero (zero optimization). We calculated the mean absolute PE (MAE) to assess accuracy and used a Friedman test for statistical comparisons. The accuracy of T-AL and the optimized LFs was compared with that of the conventional Barrett Universal II formula for ARGOS (AR-B) and OA-2000 (OA-B) with equivalent refractive index. For T-AL, AR-B, and OA-B, the MAEs ± standard deviations were 0.225 ± 0.179, 0.219 ± 0.168, and 0.242 ± 0.206 D, respectively. The Friedman test showed no statistically significant differences among the three groups. The device-optimized LFs were 2.248-2.289 (T-AL), 2.236-2.246 (AR-B), and 2.07-2.08 (OA-B); the corresponding zero-optimized LFs were 2.262-2.287 (T-AL), 2.287-2.303 (AR-B), and 2.160-2.170 (OA-B). There were no significant differences in prediction accuracy among the formulas. However, the accuracy of LF optimization varied by device, with T-AL being closest to the value under zero optimization. This suggests that T-AL is clinically useful for predicting an accurate postoperative refraction without zero optimization.
本研究旨在验证一种新的计算公式——巴雷特真实眼轴长度公式（T-AL）以及优化的晶状体系数（LF）在预测白内障手术后屈光状态方面的准确性。我们纳入了2022年1月至2023年6月期间在我们诊所接受使用Clareon单焦点人工晶状体白内障手术的156名日本患者。术后等效球镜度通过术后1个月获得的主观验光值计算得出。对晶状体系数进行优化，使每个计算公式的平均预测误差（PE）为零（零优化）。我们计算平均绝对预测误差（MAE）以评估准确性，并使用弗里德曼检验进行统计学比较。将T-AL和优化后的晶状体系数的准确性与用于ARGOS的传统巴雷特通用II公式（AR-B）和OA-2000（OA-B）且具有等效折射率的准确性进行比较。对于T-AL、AR-B和OA-B，MAE±标准差分别为0.225±0.179、0.219±0.168和0.242±0.206 D。弗里德曼检验显示三组之间无统计学显著差异。设备优化后的晶状体系数分别为2.248 - 2.289（T-AL）、2.236 - 2.246（AR-B）和2.07 - 2.08（OA-B）；相应的零优化晶状体系数分别为2.262 - 2.287（T-AL）、2.287 - 2.303（AR-B）和2.160 - 2.170（OA-B）。各公式在预测准确性方面无显著差异。然而，晶状体系数优化的准确性因设备而异，T-AL最接近零优化下的值。这表明T-AL在临床上无需零优化即可用于准确预测术后屈光状态。
