Department of Ophthalmology, Medical Academy, Lithuanian University of Health Sciences, 50161, Kaunas, Lithuania.
Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou, 310009, People's Republic of China.
Graefes Arch Clin Exp Ophthalmol. 2024 Feb;262(2):367-380. doi: 10.1007/s00417-023-06098-x. Epub 2023 Jun 6.
With the aging population, the prevalence of presbyopia and the popularity of multifocal intraocular lenses is also growing worldwide. Unfortunately, in some cases, they are still associated with postoperative visual disturbances. Recent literature started to evaluate angle kappa- and angle alpha-derived metrics of chord mu and chord alpha as possible predictive values for visual outcomes after multifocal intraocular lens implantation but the published results are inconsistent between studies. Thus, this article aims to review the role of chord mu and chord alpha as postoperative predictors after multifocal intraocular lens implantation and lay the foundation for further research.
Relevant articles were identified using the following keywords: "presbyopia," "multifocal intraocular lens," "angle kappa," "angle alpha," "Chord mu," and "Chord alpha" up to June 2022. An attempt was made to present the majority of publications that addressed the topic.
Chord mu and chord alpha have a predictive role on the outcomes after multifocal intraocular lens implantation but to a different extent. Cataract surgeons should take them into consideration and avoid implanting a multifocal intraocular lens for patients with speculated critical values of chord mu and alpha above 0.5-0.6 mm, depending on the device used for measurement and the multifocal intraocular lens implanted. Currently, chord alpha seems to be a more stable, more widely applicable, and reliable determinant in predicting postoperative outcomes and in patient selection prior to multifocal intraocular lens implantation when compared to chord mu. To draw conclusions on the topic, a controlled study is needed.
随着人口老龄化，老视眼的患病率和多焦点人工晶状体的普及在全球范围内也呈上升趋势。不幸的是，在某些情况下，它们仍然与术后视觉障碍有关。最近的文献开始评估角kappa 和角 alpha 衍生的 mu 弦和 alpha 弦的度量值作为多焦点人工晶状体植入术后视觉结果的可能预测值，但发表的结果在研究之间不一致。因此，本文旨在回顾 mu 弦和 alpha 弦作为多焦点人工晶状体植入术后预测因子的作用，并为进一步研究奠定基础。
使用以下关键词搜索相关文献：“老视眼”、“多焦点人工晶状体”、“角 kappa”、“角 alpha”、“mu 弦”和“alpha 弦”，截至 2022 年 6 月。尝试呈现大多数涉及该主题的出版物。
mu 弦和 alpha 弦对多焦点人工晶状体植入术后的结果有预测作用，但程度不同。白内障手术医生应考虑到这些因素，并避免为推测 mu 弦和 alpha 弦临界值超过 0.5-0.6mm 的患者植入多焦点人工晶状体，具体取决于用于测量的设备和植入的多焦点人工晶状体。目前，与 mu 弦相比，alpha 弦在预测术后结果和多焦点人工晶状体植入前患者选择方面似乎更稳定、更广泛适用且更可靠。为了得出关于该主题的结论，需要进行对照研究。
