Effert R, Heim T, Danassis M
Augenklinik, Medizinischen Fakultät der RWTH, Aachen, Bundesrepublik Deutschland.
Fortschr Ophthalmol. 1990;87(6):579-82.
In order to quantify the force acting in the capsular bag following implantation of an intraocular lens (IOL), 58 J- and C-loop lenses obtained from four different manufactures were implanted into the capsular bag in porcine eyes. The cornea and iris were removed before implantation. Photographs of the capsular bag before and after implantation, with a measuring rod for comparison, were taken under a microscope. In this way, the compression of the haptics could be measured (mean 1.7 mm, standard deviation 0.6 mm). Afterwards one haptic of each lens was fixed in a special mount placed on a high precision scale and the opposite haptic was compressed by 2 mm using a special micrometer-screw. After 5 min compression time, differences of 300% between the different manufacturers and lens types were measured. To find out whether the differences measured have an influence on the deformation of the capsular bag, a graph was plotted with force measured and values for elongation of the capsular bag along the axes. In this way a correlation of the elongation and the force could be shown. The results show that besides shaping the haptics of IOLs, the force necessary to compress the haptics also has an influence on the final form of the capsular bag.
为了量化人工晶状体（IOL）植入后囊袋内的作用力，从四个不同制造商处获取的58个J型和C型袢人工晶状体被植入猪眼的囊袋中。植入前先移除角膜和虹膜。在显微镜下拍摄植入前后带有用于对比的测量杆的囊袋照片。通过这种方式，可以测量袢的压缩情况（平均值为1.7毫米，标准差为0.6毫米）。之后，将每个晶状体的一个袢固定在置于高精度天平上的特殊支架中，使用特殊的微调螺丝将相对的袢压缩2毫米。在压缩5分钟后，测量发现不同制造商和晶状体类型之间存在300%的差异。为了确定所测量的差异是否会对囊袋的变形产生影响，绘制了一张图表，横轴为测量的力，纵轴为囊袋的伸长值。通过这种方式，可以显示伸长与力之间的相关性。结果表明，除了塑造人工晶状体的袢之外，压缩袢所需的力也会对囊袋的最终形态产生影响。
