Borkenstein Andreas F, Borkenstein Eva-Maria, Omidi Pooria, Langenbucher Achim
Borkenstein & Borkenstein Private Practice, Privatklinik der Kreuzschwestern Graz, Kreuzgasse 35, 8010 Graz, Austria.
Department of Experimental Ophthalmology, Saarland University, 66424 Homburg, Germany.
Vision (Basel). 2024 Nov 14;8(4):66. doi: 10.3390/vision8040066.
The number of presbyopia-correcting (premium) intraocular lenses (IOLs) is growing steadily as the desire for spectacle independence after cataract surgery increases. The aim of this laboratory study was to evaluate a newly launched hydrophobic, acrylic, polyfocal, refractive intraocular lens with a new optical design and geometry. This polyfocal IOL has three different zones (within the optic) with radially asymmetric design.
We performed optical bench tests to calculate the optical characteristics of the sample. The optical performance and quality of IOLs based on ISO 11979-2 and 11979-9 requirements were analyzed with the NIMO TR0815 (Lambda-X). In addition, optical quality metrics were evaluated with the IOLA MFD device (Rotlex). Sphere, Add, modulation transfer function (MTF), the energy distribution between the modes and the MTF along the whole range from far to near were analyzed.
The power histogram showed that the tested IOL has the characteristics of a polyfocal IOL with a wide range of optical power between 20.5 and 24.5 diopters. Two distinct peaks were observed, indicating bifocal functionality. In the radial and axial power surface map, all three zones, stated by the company, could be detected. Larger apertures lead to a significant increase in MTF at the far peak, indicating better visual acuity for distant objects under low-light conditions. It was observed that in small aperture sizes, intermediate vision seems to be dominant. The energy distribution remained almost constant with increasing aperture size.
This laboratory study was able to confirm the properties of the polyfocal lens stated by the company. Three optical zones could be identified. However, further optical bench tests should be performed to evaluate the new lens under tilted and decentered conditions. Clinical studies have to confirm that the presbyopia-correcting, polyfocal lens can achieve good clinical results with high patient satisfaction without disturbing side effects.
随着白内障手术后摆脱眼镜依赖的需求增加，用于矫正老花眼的（高端）人工晶状体（IOL）数量正在稳步增长。本实验室研究的目的是评估一种新推出的具有新型光学设计和几何形状的疏水性丙烯酸多焦点屈光性人工晶状体。这种多焦点人工晶状体在光学部内有三个不同区域，采用径向不对称设计。
我们进行了光学平台测试以计算样品的光学特性。使用NIMO TR0815（Lambda-X）根据ISO 11979-2和11979-9要求分析人工晶状体的光学性能和质量。此外，使用IOLA MFD设备（Rotlex）评估光学质量指标。分析了球镜度、附加光度、调制传递函数（MTF）、各模式之间的能量分布以及从远到近整个范围内的MTF。
屈光力直方图显示，测试的人工晶状体具有多焦点人工晶状体的特征，屈光力范围在20.5至24.5屈光度之间。观察到两个明显的峰值，表明具有双焦点功能。在径向和轴向屈光力表面图中，可以检测到该公司所述的所有三个区域。较大的孔径导致远焦峰值处的MTF显著增加，表明在低光条件下远处物体的视力更好。据观察，如果孔径较小，中间视力似乎占主导。随着孔径大小增加，能量分布几乎保持不变。
本实验室研究能够证实该公司所述的多焦点晶状体的特性。可以识别出三个光学区域。然而，应进行进一步的光学平台测试，以评估新晶状体在倾斜和偏心条件下的性能。临床研究必须证实，这种矫正老花眼的多焦点晶状体能够取得良好的临床效果，患者满意度高，且无不良副作用。
