激光原位角膜磨镶术生物的力学特性

依据角膜的生物力学特点和结构特性,构造了角膜几何模型,以可视化模拟为原则、以有限元技术为基本方法,对激光原位角膜磨镶术进行了计算机模拟计算分析.探讨了角膜基质切削深度、切削光区直径以及眼内压值等重要手术参数对手术效果的影响.结果表明,眼压较大而角膜较薄的人不宜做LASIK手术,切削光区直径较小的矫正效果较好;采用现代工程分析知识及相关软件对激光原位角膜磨镶术生物力学特性进行分析,其结果对手术有很大的实际意义和一定的参考价值.

Biomechanical Characteristics of LASIK

Based on the biomechanical and structural characteristics of cornea,a geometrical model of cornea is developed,combining the visualization with finite element method to compute simulatively LASIK(laser in-situ keratomileusis).The Influences of corneal stroma cutting depth,optical zone diameter cut and intraocular pressure(IOP) on operation result are discussed.It is shown that the LASIK operation is unsuitable to those ones whose IOP is high with thin cornea,and a better rectifying effect by LASIK is available to those ones whose optical zone diameter to cut are smaller.The biomechanical analysis made by sophisticated engineering technologies and relevant software is proved highly significant and pragmatic for reference.