5展望
现在临床上植入的可调节IOL和具有拟调节功能的IOL都是基于焦点漂移原则[41]。其平均向前漂移距离产生的拟调节力大多低于正常调节力(3D)时漂移的距离(正常眼大约1.8mm)[44]。眼前段的正常解剖也不允许IOL向前移位2mm,这样将出现诸如角膜内皮失代偿、虹膜色素脱失等一系列并发症。因此,前面所描述的IOL植入后产生的拟调节力仅能降低患者术后对眼镜的依赖。晶状体屈光手术理想的治疗方案为:应用超声乳化术、通过微小切口去除晶状体囊袋内物质[45],用透明、无毒、生物相容性高、富有弹性的物质填充晶状体囊袋,术后晶状体有像年轻人一样的调节变形功能[46],但发明这种物质尚需等待材料工程技术的进一步努力。当然,在高科技迅猛发展的今天,我们设想微智能芯片载入IOL也将成为可能,将视近时产生的神经电信号传递给人工晶状体发生相应的变形功能,屈光力发生相应的改变。
【参考文献】 1徐广第.眼科屈光学.北京:军事医学出版社.1995:91
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