Łabuz Grzegorz, Yan Weijia, Khoramnia Ramin, Auffarth Gerd U
The David J. Apple Center for Vision Research, Department of Ophthalmology, University Hospital Heidelberg, INF 400, 69120 Heidelberg, Germany.
Eye Center, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China.
Biomed Opt Express. 2024 Sep 27;15(10):6073-6082. doi: 10.1364/BOE.533714. eCollection 2024 Oct 1.
This study aimed to determine the through-focus performance and the effect of misalignment on the optical quality of different aspheric monofocal intraocular lenses (IOLs). To this end, optical quality was assessed in three IOL models with different optic surfaces: standard aberration neutral model and two spherical aberration (SA) correcting, one of which utilizes higher-order aspheric terms. The optical quality was measured by means of the modulation transfer function at 3- and 4.5-mm pupils and under monochromatic and polychromatic light with different corneal SA. The optically derived range of vision and tolerance to misalignment were also tested. The study demonstrated that the type of IOL surface affects the monofocal implant's performance. Although a standard primary-SA correction may improve scotopic image quality, misalignment may diminish this advantage. The higher-order aspheric surface used to correct SA provided an improved performance against decentration and offered a higher optical quality than the aberration-neutral design when tested in a model eye. The latter, however, demonstrated a high tolerance to misalignment, offering a slight extension of the range of vision, potentially resulting from uncorrected optical aberrations.
本研究旨在确定不同非球面单焦点人工晶状体（IOL）的全焦距性能以及偏心对其光学质量的影响。为此，对三种具有不同光学表面的IOL模型进行了光学质量评估：标准像差中性模型和两种矫正球差（SA）的模型，其中一种利用了高阶非球面项。通过在3毫米和4.5毫米瞳孔下以及在具有不同角膜球差的单色和多色光下的调制传递函数来测量光学质量。还测试了光学推导的视觉范围和对偏心的耐受性。研究表明，IOL表面类型会影响单焦点植入物的性能。虽然标准的初级球差校正可能会改善暗视觉图像质量，但偏心可能会削弱这一优势。用于校正球差的高阶非球面表面在模型眼中测试时，相对于偏心提供了更好的性能，并且比像差中性设计具有更高的光学质量。然而，后者表现出对偏心的高耐受性，提供了轻微的视觉范围扩展，这可能是由未校正的光学像差导致的。
