Artal Pablo, Manzanera Silvestre, Piers Patricia, Weeber Henk
Laboratorio de Optica, Centro de Investigación en Optica y Nanofísica (CiOyN), Universidad de Murcia, Campus de Espinardo, Murcia, Spain.
Opt Express. 2010 Jan 18;18(2):1637-48. doi: 10.1364/OE.18.001637.
An instrument permitting visual testing in white light following the correction of spherical aberration (SA) and longitudinal chromatic aberration (LCA) was used to explore the visual effect of the combined correction of SA and LCA in future new intraocular lenses (IOLs). The LCA of the eye was corrected using a diffractive element and SA was controlled by an adaptive optics instrument. A visual channel in the system allows for the measurement of visual acuity (VA) and contrast sensitivity (CS) at 6 c/deg in three subjects, for the four different conditions resulting from the combination of the presence or absence of LCA and SA. In the cases where SA is present, the average SA value found in pseudophakic patients is induced. Improvements in VA were found when SA alone or combined with LCA were corrected. For CS, only the combined correction of SA and LCA provided a significant improvement over the uncorrected case. The visual improvement provided by the correction of SA was higher than that from correcting LCA, while the combined correction of LCA and SA provided the best visual performance. This suggests that an aspheric achromatic IOL may provide some visual benefit when compared to standard IOLs.
一种在矫正球差（SA）和纵向色差（LCA）后可在白光下进行视觉测试的仪器，被用于探究SA和LCA联合矫正对未来新型人工晶状体（IOL）视觉效果的影响。眼睛的LCA通过衍射元件进行矫正，SA则由自适应光学仪器控制。系统中的一个视觉通道可在三名受试者中测量6 c/deg下的视力（VA）和对比敏感度（CS），针对LCA和SA存在与否组合产生的四种不同情况。在存在SA的情况下，诱导出假晶状体患者中发现的平均SA值。单独矫正SA或SA与LCA联合矫正时，VA均有改善。对于CS，只有SA和LCA联合矫正相比于未矫正情况有显著改善。SA矫正带来的视觉改善高于LCA矫正，而LCA和SA联合矫正提供了最佳视觉性能。这表明与标准IOL相比，非球面消色差IOL可能会带来一些视觉益处。
