Department of Ophthalmology, University of Showa, Fujigaoka Rehabilitation Hospital, Yokohama, Japan.
Ophthalmologica. 2012;227(4):197-204. doi: 10.1159/000333820. Epub 2012 Jan 3.
To evaluate the influence of decentration on optical performance in multifocal intraocular lenses (IOLs) using eye models.
This study evaluated 4 types of multifocal IOLs (ReSTOR SA60D3, Alcon; TECNIS Multifocal ZM900, AMO; ReZoom, AMO; SFX-MV1, Hoya). The evaluations were based on measurements of the near and far modulation transfer function (MTF) and visualized actual near images (newspaper) using eye models with the IOL horizontally displaced 0, 0.25, 0.5, 0.75 and 1.0 mm from the center.
For the diffractive ReSTOR the near MTF decreased with increasing decentration. The near images (newspaper characters) became difficult to distinguish at a decentration of 1.0 mm. For the diffractive ZM900, the near and far MTFs gradually decreased with increasing decentration. For the refractive ReZoom and SFX-MV1, we observed almost no change in the near MTF from a decentration of 0-1.0 mm. However, the far MTF clearly decreased starting at a decentration of 1.0 mm for ReZoom and 0.75 mm for SFX-MV1.
The MTFs and near images are affected to a different extent depending on the design of multifocal IOLs; clinically relevant effects are not to be expected up to a decentration of 0.75 mm.
使用眼模型评估离焦对多焦点人工晶状体（IOL）光学性能的影响。
本研究评估了 4 种多焦点 IOL（ReSTOR SA60D3，Alcon；TECNIS Multifocal ZM900，AMO；ReZoom，AMO；SFX-MV1，Hoya）。评估基于近和远调制传递函数（MTF）的测量，并使用水平离焦 0、0.25、0.5、0.75 和 1.0 毫米的眼模型可视化实际近像（报纸）。
对于衍射型 ReSTOR，近 MTF 随离焦增加而降低。在 1.0 毫米的离焦下，近像（报纸字符）变得难以区分。对于衍射型 ZM900，近和远 MTF 随离焦增加逐渐降低。对于折射型 ReZoom 和 SFX-MV1，我们观察到近 MTF 从 0-1.0 毫米的离焦几乎没有变化。然而，对于 ReZoom，远 MTF 从 1.0 毫米的离焦开始明显降低，对于 SFX-MV1，远 MTF 从 0.75 毫米的离焦开始明显降低。
多焦点 IOL 的设计会对 MTF 和近像产生不同程度的影响；在 0.75 毫米的离焦范围内，预计不会产生临床相关的影响。
