Kulnig W, Menapace R, Skorpik C, Juchem M
First University Eye Clinic, University of Vienna, Austria.
J Cataract Refract Surg. 1987 Nov;13(6):635-9. doi: 10.1016/s0886-3350(87)80153-0.
The optical resolution and contrast of 18 silicone and 18 polymethylmethacrylate (PMMA) intraocular lenses were determined before implantation in and after removal from rabbit eyes. A specially designed microphotographic system that allows documentation and comparison of the image quality of different lens types was used. Silicone intraocular lenses showed a mean axial resolution of 1.25, PMMA lenses showed 1.60, of an optotype analogous resolution target (1.0 = 20/20) at a 3 mm pupil opening preoperatively. At one to 16 weeks postoperatively, both types of IOLs demonstrated nearly unchanged resolution. Contrast, however, decreased to between 60% and 85% of the preoperative 100% standard. This decrease was due to precipitates deposited on the lens surface, to posterior capsule opacification, and to lens decentration.
在将18枚硅胶人工晶状体和18枚聚甲基丙烯酸甲酯（PMMA）人工晶状体植入兔眼之前以及从兔眼取出之后，测定了它们的光学分辨率和对比度。使用了一种专门设计的显微摄影系统，该系统能够记录并比较不同类型晶状体的图像质量。硅胶人工晶状体术前在3mm瞳孔孔径下的平均轴向分辨率为1.25，PMMA人工晶状体为1.60，相当于视力表分辨率目标（1.0 = 20/20）。术后1至16周，两种类型的人工晶状体分辨率几乎未变。然而，对比度降至术前100%标准的60%至85%之间。这种降低是由于晶状体表面沉积的沉淀物、后囊膜混浊以及晶状体偏心所致。
