Here, we present a full wave propagation model that quantitatively assesses the effect of astigmatism on visual functions in eyes with diffractive bifocal IOLs. The proposed model with bifocal IOLs evaluated the image quality of each focus at varying degrees of corneal astigmatism with the metrics of modulation transfer function and light-in-the-bucket. The results show that corneal astigmatism alters the distance-near image quality balance. Positive (negative) astigmatism has more detrimental effects on far (near) vision. Additionally, bifocal IOLs are more vulnerable to corneal astigmatism, highlighting the need to consider multifocal toric IOLs with astigmatism greater than 1.0 D. The numerical results closely agreed with previous relevant clinical findings, suggesting the clinical usability of the presented method in predicting the postoperative visual function of patients.

中文翻译：

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角膜散光对双焦点人工晶状体眼近、远视力的影响

在这里，我们提出了一个全波传播模型，可以定量评估散光对衍射双焦点人工晶状体眼睛视觉功能的影响。所提出的双焦点人工晶状体模型通过调制传递函数和桶中光的指标评估了不同程度的角膜散光下每个焦点的图像质量。结果表明，角膜散光改变了远近图像质量平衡。正（负）散光对远（近）视力的不利影响更大。此外，双焦点 IOL 更容易受到角膜散光的影响，突出表明需要考虑散光大于 1.0 D 的多焦点复曲面 IOL。数值结果与之前的相关临床结果非常一致，表明所提出的方法在预测术后视力方面的临床可用性患者的功能。