[Experimental study on viscoelastic properties of human cornea].
The biomechanical properties of eight human corneas from four normal Chinese fresh corpses were investigated by use of one dimension tensile test, tensile stress relaxation and creep test. The destructive load, stretchy ratio, spreading stress, spreading strain and elastic modulus were determined. Also obtained were the stress relaxation and creep data and curves. After reduction of data, the reduced stress relaxation and creep data and curves were worked out. The regression method was used to get the regression coefficient. The least square method was employed to fit the data of stress and strain; then the stress-strain formula was expressed and the curves of human cornea were plotted. The constitutive equation is K (lambda,t) = G(t) T(e) (lambda) and some conclusions are drawn.
Zhao
Meisheng
M
Ophthalmology Department , Second Hospital of Jilin University, Changchun 130041, China. xinghua@jlu.edu.cn
Zhang
Zhongjun
Z
Ma
Hongshun
H
Sun
Wei
W
Li
Xiaoqian
X
D001696:Biomechanical Phenomena; D003315:Cornea / Q000502:physiology*; D055119:Elastic Modulus; D006801:Humans; D013314:Stress, Mechanical