Furlan Walter D, Martínez-Espert Anabel, Montagud-Martínez Diego, Ferrando Vicente, García-Delpech Salvador, Monsoriu Juan A
Departamento de Óptica y Optometría y Ciencias de la Visión, Universitat de València, Burjassot, Spain.
Centro de Tecnologías Físicas, Universitat Politècnica de València, Valencia, Spain.
Biomed Opt Express. 2023 Apr 28;14(5):2365-2374. doi: 10.1364/BOE.487812. eCollection 2023 May 1.
In this work, we propose a new diffractive trifocal intraocular lens design with focus extension, conceived to provide a high visual performance at intermediate distances. This design is based on a fractal structure known as the "Devil's staircase". To assess its optical performance, numerical simulations have been performed with a ray tracing program using the Liou-Brennan model eye under polychromatic illumination. The simulated through the focus visual acuity was the merit function employed to test its pupil-dependence and its behavior against decentering. A qualitative assessment of the multifocal intraocular lens (MIOL) was also performed experimentally with an adaptive optics visual simulator. The experimental results confirm our numerical predictions. We found that our MIOL design has a trifocal profile, which is very robust to decentration and has low degree of pupil dependence. It performs better at intermediate distances than at near distances and, for a pupil diameter of 3 mm, it works like an EDoF lens over almost the entire defocus range.
在这项工作中，我们提出了一种具有焦点扩展功能的新型衍射三焦点人工晶状体设计，旨在在中等距离提供高视觉性能。该设计基于一种称为“魔鬼阶梯”的分形结构。为了评估其光学性能，我们使用光线追踪程序，在多色照明下，基于刘-布伦南模型眼进行了数值模拟。模拟的焦点视力是用于测试其瞳孔依赖性和偏心行为的评价函数。我们还使用自适应光学视觉模拟器对多焦点人工晶状体（MIOL）进行了实验性定性评估。实验结果证实了我们的数值预测。我们发现，我们的MIOL设计具有三焦点轮廓，对偏心非常稳健，并且瞳孔依赖性程度较低。它在中等距离的表现优于近距离，对于3mm的瞳孔直径，它在几乎整个散焦范围内的工作方式类似于扩展景深（EDoF）透镜。
