OPTICAL RESOLUTION OF FOLDABLE INTRAOCULAR LENSES

被引：10

作者：

KULNIG, W

SKORPIK, C

机构：

[1] First Department of Ophthalmology, The Institute of Micromorphology and Electron Microscopy, University of Vienna Medical School, Vienna

来源：

JOURNAL OF CATARACT AND REFRACTIVE SURGERY | 1990年 / 16卷 / 02期

关键词：

foldable intraocular lens; implantation simulation; optical resolution; surface quality;

D O I：

10.1016/S0886-3350(13)80733-X

中图分类号：

R77 [眼科学];

学科分类号：

100212 ;

摘要：

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. © 1990, American Society of Cataract and Refractive Surgery. All rights reserved.

引用

页码：211 / 216

页数：6

共 11 条

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