正常人眼筛板的结缔组织纤维结构

采用组化特染，透射电镜和图象分析仪观察了３５只正常人眼筛板结缔组织的纤维成分和结构形态，根据生物力学原理分析了筛束的力学性质和筛板的结构特征，探讨了筛板的损害形式和在眼压与视神经损害间的中介作用及其影响因素。结果显示，筛束含有细胞间质所有三种纤维，具有弹性、塑性和刚性三重复合性质，筛板纵向椭圆、筛束行径和密度象限性差异及筛板厚度个体性差异等与筛板抗损害性能有关。眼压对筛板作用有两种途径，筛板损害是

FiBrous structure of connective tissue of normal human lamina cribrosa

Fibrous components and structural morphology of the connective tissue of the lamina cribrosa obtained from 35 normal human autopsy eyes were examined by histochemical staining,trans-mission electron microscopic and computer-assistant image analytical techniques.Principles of biome-chanics were used onto the lamina cribrosa in characterizing its structural and mechanical properties,and in investigating its damage forms,intermediary role between intraocular pressure and Optic nerve dam-age,and intervening factors.We came to the following conclusions:The laminar bundles contain all the three kinds of fibers and behave in such triplex properties as elasticity,plasticity and stiffness.The el-lipse shaped transverse section of the lamina cribrosa with the long axis at the vertical meridian,the quadrant variations in the course and density of laminar bundles,and the interindividual variations in the thickness of the lamina cribrosa are responsible for the damage-resistant ability of lamina cribrosa.The intraocular pressure exerts effects upon the lamina cribrosa through two ways,and the damage of the lamina cribrosa is the intermediate link between the insults of the intraocular pressure and the optic nerve damage.