Armengol Jesús, Garzón Nuria, Vega Fidel, Altemir Irene, Millán Maria S
Departament d'Òptica i Optometria, Universitat Politècnica de Catalunya, Barcelona Tech, Violinista Vellsolà 37, 08222 Terrassa, Spain.
Miranza IOA, Galileo 104, 28003 Madrid, Spain.
Biomed Opt Express. 2020 Apr 30;11(5):2818-2829. doi: 10.1364/BOE.388531. eCollection 2020 May 1.
This article studies the relationship between two metrics, the area under the modulation transfer function (MTFa) and the energy efficiency (EE), and their ability to predict the visual quality of patients implanted with multifocal intraocular lenses (IOLs). The optical quality of IOLs is assessed in vitro using two metrics, the MTFa and EE. We measured them for three different multifocal IOLs with parabolic phase profile using image formation, through-focus (TF) scanning, three R, G, B wavelengths, and two pupils. We analyzed the correlation between MTFa and EE. In parallel, clinical defocus curves of visual acuity (VA) were measured and averaged from sets of patients implanted with the same IOLs. An excellent linear correlation was found between the MTFa and EE for the considered IOLs, wavelengths and pupils (R > 0.9). We computed the polychromatic TF-MTFa, TF-EE, and derived mathematical relationships between each metrics and clinical average VA. MTFa and EE proved to be equivalent metrics to characterize the optical quality of the studied multifocal IOLs and also in terms of clinical VA predictability.
本文研究了调制传递函数下的面积（MTFa）和能量效率（EE）这两个指标之间的关系，以及它们预测植入多焦点人工晶状体（IOL）患者视觉质量的能力。使用MTFa和EE这两个指标在体外评估IOL的光学质量。我们通过成像、全聚焦（TF）扫描、三个R、G、B波长和两个瞳孔，对三种具有抛物线相位分布的不同多焦点IOL进行了测量。我们分析了MTFa与EE之间的相关性。同时，对植入相同IOL的患者组测量并平均了视力（VA）的临床散焦曲线。在所考虑的IOL、波长和瞳孔方面，MTFa与EE之间发现了极好的线性相关性（R > 0.9）。我们计算了多色TF-MTFa、TF-EE，并推导了每个指标与临床平均VA之间的数学关系。MTFa和EE被证明是表征所研究多焦点IOL光学质量以及临床VA可预测性方面的等效指标。
