López-Gil Norberto, Montés-Micó Robert
CiVi-UM, University of Murcia, Murcia, Spain.
J Cataract Refract Surg. 2007 Jul;33(7):1296-302. doi: 10.1016/j.jcrs.2007.03.041.
To describe the design of a new intraocular lens (IOL) capable of correcting spherical and chromatic aberrations when implanted in the human eye.
University of Murcia, Murcia, and University of Valencia, Valencia, Spain.
A hybrid singlet achromatic IOL was designed. The IOL has a combination of a refractive and a diffractive surface, with 1 of the surfaces being aspherical. Optical simulations were used to model the polychromatic modulation transfer function (MTF) in pseudophakic eyes to explain the differences in optical quality afforded by the achromatic IOL. Parameters such as focus shift, optical path difference, through-focus, and robustness to tilt and decentering of achromatic IOLs were obtained.
The polychromatic MTF in an eye with a centered, not tilted achromatic IOL was near the diffraction-limited MTF. The focus shift change for the achromatic IOL through the visible spectrum was approximately 0.1 diopter. The polychromatic MTF in an eye with the achromatic IOL would be similar to that in an eye with a spherically centered IOL if the achromatic IOL were decentered 1.0 mm or tilted 4 degrees. The range of centration and tilt error for the achromatic IOL to obtain an optical benefit in the polychromatic MTF was larger than the typical postoperative IOL decentration and tilt errors.
The hybrid singlet achromatic IOL design resolved the chromatic aberration problem, improving the overall optical quality in the human eye.
描述一种新型人工晶状体（IOL）的设计，该晶状体植入人眼后能够矫正球差和色差。
西班牙穆尔西亚的穆尔西亚大学和巴伦西亚的巴伦西亚大学。
设计了一种混合单重消色差人工晶状体。该人工晶状体具有折射面和衍射面的组合，其中一个表面为非球面。使用光学模拟对假晶状体眼中的多色调制传递函数（MTF）进行建模，以解释消色差人工晶状体所提供的光学质量差异。获得了诸如焦点偏移、光程差、全焦点以及消色差人工晶状体对倾斜和偏心的鲁棒性等参数。
在植入中心位置、无倾斜的消色差人工晶状体的眼中，多色MTF接近衍射极限MTF。消色差人工晶状体在可见光谱范围内的焦点偏移变化约为0.1屈光度。如果消色差人工晶状体偏心1.0毫米或倾斜4度，其眼中的多色MTF将与植入球心位置人工晶状体的眼中的多色MTF相似。消色差人工晶状体在多色MTF中获得光学益处的中心定位和倾斜误差范围大于典型的术后人工晶状体偏心和倾斜误差。
混合单重消色差人工晶状体设计解决了色差问题，提高了人眼的整体光学质量。
