Kulnig W, Skorpik C
First Department of Ophthalmology, University of Vienna Medical School, Austria.
J Cataract Refract Surg. 1990 Mar;16(2):211-6. doi: 10.1016/s0886-3350(13)80733-x.
Recently manufactured intraocular lenses (IOLs) (STAAR AA 4203 made of silicone and IOGEL PC-12 made of polyHEMA) were tested before and after implantation simulation for axial optical resolution (model eye), for optical surface quality (photokeratoscope), and for surface microtrauma (scanning electron microscopy). At a 3 mm pupillary opening, both lens types achieved a mean axial resolution of 1.25 (range 1.0 to 1.5) on an optotype analogous resolution target. When the pupillary opening was increased to 6 mm, polymacon IOLs showed only a moderate resolution decrease (up to one line) and loss of contrast (up to 30%); silicone IOLs showed almost no decrease. Photokeratoscopic evaluation revealed that a circular optical nonhomogeneity at the peripheral optical zone of the hydrogel IOLs is the source of this impairment. Groove-like surface deformities occasionally observed by scanning electron microscopy did not detectably decrease resolution or contrast.
最近生产的人工晶状体（IOLs）（由硅胶制成的STAAR AA 4203和由聚甲基丙烯酸羟乙酯制成的IOGEL PC - 12）在模拟植入前后，针对轴向光学分辨率（模型眼）、光学表面质量（角膜地形图仪）以及表面微创伤（扫描电子显微镜）进行了测试。在3毫米瞳孔孔径下，两种类型的晶状体在类似视标的分辨率目标上均实现了1.25的平均轴向分辨率（范围为1.0至1.5）。当瞳孔孔径增加到6毫米时，聚甲基丙烯酸甲酯人工晶状体仅显示出适度的分辨率下降（最多一行）和对比度损失（最多30%）；硅胶人工晶状体几乎没有下降。角膜地形图仪评估显示，水凝胶人工晶状体周边光学区的圆形光学不均匀性是这种损害的根源。通过扫描电子显微镜偶尔观察到的沟槽状表面变形并未显著降低分辨率或对比度。
