THE MECHANICAL-PROPERTIES OF THE RABBIT AND HUMAN CORNEA
THE MECHANICAL-PROPERTIES OF THE RABBIT AND HUMAN CORNEA
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DOI：
10.1016/0021-9290(86)90135-1
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发表时间：
1986-01-01
影响因子：
2.4
通讯作者：
MAURICE, DM
中科院分区：
文献类型：
--
作者：
JUE, B;MAURICE, DM
兔和人角膜的延展性是通过升高眼睛的完整地球仪内的压力并测量两个非常小的汞滴在角膜表面上的位移来测量的。人角膜在低应力下表现出可忽略不计的延展性。然而，兔组织在低压下经历9%的应变，应力与应变之间具有曲线关系。在较高的压力下，关系是线性的，并且组织显示出一定的蠕变。家兔的低压应力-应变关系不能解释为胶原纤维从正弦波的初始设定被拉直。当基质从德斯密氏膜分离时，在兔和人中显示出可忽略的低压伸展性。另一方面，在两种物种中分离的德斯密氏膜具有很强的伸展性。它们之间在完整角膜行为上的差异似乎在于基质和德斯密膜中的相对初始应变。
The extensibility of rabbit and human corneas was measured by raising the pressure within the intact globe of the eye and measuring the displacement of two very small mercury drops on the corneal surface. The human cornea showed a negligible extensibility under low stresses. The rabbit tissue, however, underwent a 9% strain under low pressures with a curvilinear relationship between stress and strain. At higher pressures the relationship was linear, and the tissue showed some creep. The low pressure stress-strain relationship of the rabbit could not be explained on the basis that the collagen fibrils were being straightened out from an initial set in a sinusoidal wave. When the stroma was isolated from Descemet''s membrane, it showed a negligible low pressure extensibility in rabbit and man. On the other hand, isolated Descemet''s membrane was very extensible in both species. The difference between them in the behavior of the intact cornea seems to lie in the relative initial strain in the stroma and Descemet''s membrane.