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首页> 外文期刊>Journal of cataract and refractive surgery >Image quality with multifocal intraocular lenses and the effect of pupil size: comparison of refractive and hybrid refractive-diffractive designs.
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Image quality with multifocal intraocular lenses and the effect of pupil size: comparison of refractive and hybrid refractive-diffractive designs.

机译：多焦点人工晶状体的图像质量和瞳孔大小的影响：屈光和混合屈光设计的比较。

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PURPOSE: To analyze the image quality with a refractive and 2 hybrid refractive-diffractive multifocal intraocular lenses (IOLs) in vitro to determine the IOL modulation transfer function (MTF) following the EN-ISO international standard for distance and near vision and to study the IOLs' behavior with different pupil sizes. SETTING: Fundacion Oftalmologica del Mediterraneo, Valencia, Spain. METHODS: This study evaluated 4 IOLs: the hybrid refractive-diffractive AcrySof ReSTOR SN60D3 (Alcon) and Tecnis ZM900 (AMO), the refractive ReZoom NXG (AMO), and the monofocal AcrySof SN60WF (Alcon). The MTF was calculated from the cross-line spread function recorded with the OPAL Vector System (Image Science Ltd.) using fast Fourier transform techniques. The artificial eye model simulated in vivo conditions of the anterior chamber and included an artificial cornea and physiological solution, in which the IOLs were positioned. The pupil sizes varied between 2.0 mm and 5.0 mm in steps of 0.5 mm. RESULTS: For distance vision and small pupils (2.0 to 3.5 mm), the refractive IOL provided better image quality than the 2 hybrid IOLs. When the pupil was larger, the distance vision was similar with all IOLs. The 2 hybrid IOLs gave better image quality than the refractive IOL for near vision with any pupil size. With the refractive IOL and pupils smaller than 3.5 mm, near focusing did not occur, resulting in poor image quality. Of the hybrid IOLs, the AcrySof ReSTOR SN60D3 provided better distance image quality and the Tecnis ZM900 provided better near image quality. CONCLUSIONS: The refractive IOL gave better image quality than the hybrid IOLs at distance and with small pupils. With pupils larger than 3.5 mm, the quality was similar. Hybrid IOLs gave significantly better image quality for near vision with all pupil sizes. AcrySof ReSTOR SN60D3 IOLs give better distance vision than Tecnis ZM900 IOLs; the latter gave better near vision. The reference monofocal IOL provided better distance images than any multifocal IOL with all pupil sizes.
机译：目的：使用屈光和2个屈光折射混合多焦点人工晶状体（IOL）进行体外图像质量分析，以确定远距和近视国际标准的IOL调制传递函数（MTF），并研究不同瞳孔大小的人工晶体的行为。地点：西班牙巴伦西亚，地中海基金会（Fundacion Oftalmologica del Mediterraneo）。方法：本研究评估了4种IOL：ReSTOR SN60D3（Alcon）和Tecnis ZM900（AMO）的混合折射衍射AcrySof，ReZoom NXG（AMO）折射和SN60WF（Alcon）单焦点AcrySof。使用快速傅立叶变换技术根据OPAL向量系统（Image Science Ltd.）记录的交叉线扩展函数计算MTF。人工眼模型模拟了前房的体内状况，并包括人工角膜和生理溶液，其中放置了人工晶体。瞳孔尺寸在2.0毫米至5.0毫米之间变化，步长为0.5毫米。结果：对于远视和小瞳孔（2.0至3.5 mm），屈光IOL提供的图像质量比2种混合IOL更好。当瞳孔变大时，所有IOL的远视力都相似。对于任何瞳孔大小的近视，这两种混合式IOL都比折射IOL提供更好的图像质量。在屈光IOL和瞳孔小于3.5 mm的情况下，不会发生近聚焦，从而导致图像质量差。在混合IOL中，AcrySof ReSTOR SN60D3提供了更好的远距离图像质量，Tecnis ZM900提供了更好的近距离图像质量。结论：在远距离和瞳孔较小的情况下，屈光性IOL的图像质量优于混合IOL。对于大于3.5毫米的瞳孔，质量相似。混合IOL在所有瞳孔尺寸下都能为近视提供更好的图像质量。与Tecnis ZM900 IOL相比，AcrySof ReSTOR SN60D3 IOL提供更好的远距视觉;后者提供了更好的近视力。与所有瞳孔大小的任何多焦点IOL相比，参考单焦点IOL提供了更好的距离图像。

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