Eisenmann D, Jacobi K W
Universitäts-Augenklinik Giessen.
Klin Monbl Augenheilkd. 1993 Sep;203(3):189-94. doi: 10.1055/s-2008-1045666.
Common refractive bifocal IOLs feature 2 or 3 spherical zones with different refraction; the design of the Array multifocal IOL consists of 5 concentric zones, each of them providing a progressive near addition with multiple foci by means of an aspherical surface.
As a part of a prospective study, distance and near visual acuity, contrast sensitivity, glare and depth of field were examined in 15 patients with the Array lens and a monofocal control group 12 months after implantation. Subjective assessment of the optical quality was performed by detailed asking for optical symptoms. Results were retrospectively compared with the one year follow-up of 15 patients with diffractive bifocal IOLs.
No difference was found for best corrected far and near visual acuity and sensitivity for high contrasts. Glare and sensitivity for low contrasts of the monofocal IOL was significantly superior to both multifocal models. Array IOL and diffractive IOL achieved a near acuity of Nieden 2-1 with only distance correction; defocus curves revealed an increase in the depth of field, but with a superiority of the Array lens in intermediate imaging. Optical symptoms as halos were much more frequent in patients with the diffractive IOL than in the Array group.
Functional results of the Array multifocal IOL seem to be comparable to those of the diffractive bifocal IOL, but with the advantage of an improved intermediate imaging and a reduction of optical side effects.
常见的折射型双焦点人工晶状体具有2个或3个具有不同屈光度的球面区；Array多焦点人工晶状体的设计由5个同心区组成，每个同心区通过非球面表面提供具有多个焦点的渐进性近附加屈光度。
作为一项前瞻性研究的一部分，在植入后12个月，对15例植入Array晶状体的患者和一个单焦点对照组进行了远视力和近视力、对比敏感度、眩光和景深的检查。通过详细询问视觉症状对光学质量进行主观评估。结果与15例衍射型双焦点人工晶状体患者的一年随访结果进行回顾性比较。
在最佳矫正远视力和近视力以及高对比度敏感度方面未发现差异。单焦点人工晶状体的眩光和低对比度敏感度明显优于两种多焦点模型。Array人工晶状体和衍射型人工晶状体仅通过距离矫正就能达到Nieden 2-1的近视力；散焦曲线显示景深增加，但Array晶状体在中间成像方面更具优势。衍射型人工晶状体患者出现光晕等视觉症状的频率远高于Array组。
Array多焦点人工晶状体的功能结果似乎与衍射型双焦点人工晶状体相当，但具有改善中间成像和减少光学副作用的优势。
