Artigas José M, Peris Cristina, Felipe Adelina, Menezo José L, Sánchez-Cortina Isaias, López-Gil Norberto
Fundación Oftalmológica del Mediterráneo, Departamento de Optica, Facultad de Física, Universidad de Valencia, Valencia, Spain.
J Cataract Refract Surg. 2009 Apr;35(4):747-52. doi: 10.1016/j.jcrs.2008.12.020.
To study in a standard eye model the changes in modulation transfer function (MTF) of a monofocal intraocular lens (IOL) when a phakic IOL (pIOL) is placed in the anterior chamber, compare the MTFs of the rigid Artisan pIOL and foldable Artiflex pIOL, and evaluate the temporal evolution of the MTF of the foldable pIOL after the mechanical stress the pIOL undergoes when injected.
Fundación Oftalmológica del Mediterráneo, Valencia, Spain.
The MTF values of the IOLs were calculated from the cross-line spread function recorded with the Opal Vector System. The measurements were taken using an eye model following the British and EN-ISO standards with 2.0 mm, 3.0 mm, 4.0 mm, and 5.0 mm pupils. A 28.00 diopter (D) Ophtec monofocal IOL was used as the crystalline lens. The 2 pIOLs were -9.00 D.
The MTF of the rigid pIOL was slightly better than the MTF of the foldable pIOL with all pupil sizes. Both pIOLs provided good optics quality when compared with the monofocal IOL. The injection effect of the foldable IOL disappeared after 2 hours.
The MTF of the monofocal IOL was slightly reduced with implantation of a negative pIOL in the anterior chamber. The rigid pIOL provided better optical performance than the foldable pIOL with all pupil sizes, as shown by the MTF values. The decrease in MTF caused by the mechanical stress on the foldable pIOL was nullified after 2 hours with no effect on optical quality.
在标准眼模型中研究当有晶状体眼人工晶状体（pIOL）植入前房时单焦点人工晶状体（IOL）的调制传递函数（MTF）变化，比较硬性Artisan pIOL和可折叠Artiflex pIOL的MTF，并评估可折叠pIOL在注射时所承受机械应力后MTF的时间演变。
西班牙巴伦西亚地中海眼科基金会。
IOL的MTF值由使用Opal Vector系统记录的交叉线扩展函数计算得出。测量采用符合英国和EN-ISO标准的眼模型，瞳孔直径分别为2.0毫米、3.0毫米、4.0毫米和5.0毫米。使用28.00屈光度（D）的Ophtec单焦点IOL作为晶状体。两种pIOL的屈光度均为-9.00 D。
在所有瞳孔大小情况下，硬性pIOL的MTF略优于可折叠pIOL。与单焦点IOL相比，两种pIOL均提供了良好的光学质量。可折叠IOL的注射效应在2小时后消失。
在前房植入负屈光度pIOL会使单焦点IOL的MTF略有降低。MTF值表明，在所有瞳孔大小情况下，硬性pIOL比可折叠pIOL具有更好的光学性能。可折叠pIOL因机械应力导致的MTF下降在2小时后消失，对光学质量无影响。
