Viscoelastic characterization of peripapillary sclera: material properties by quadrant in rabbit and monkey eyes.
J Biomech Eng
; 125(1): 124-31, 2003 Feb.
Article
em En
| MEDLINE
| ID: mdl-12661206
ABSTRACT
In this report we characterize the viscoelastic material properties of peripapillary sclera from the four quadrants surrounding the optic nerve head in both rabbit and monkey eyes. Scleral tensile specimens harvested from each quadrant were subjected to uniaxial stress relaxation and tensile ramp to failure tests. Linear viscoelastic theory, coupled with a spectral reduced relaxation function, was employed to characterize the viscoelastic properties of the tissues. We detected no differences in the stress-strain curves of specimens from the four quadrants surrounding the optic nerve head (ONH) below a strain of 4 percent in either the rabbit or monkey. While the peripapillary sclera from monkey eyes is significantly stiffer (both instantaneously and in equilibrium) and relaxes more slowly than that from rabbits, we detected no differences in the viscoelastic material properties (tested at strains of 0-1 percent) of sclera from the four quadrants surrounding the ONH within either species group.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Esclera
/
Modelos Biológicos
Tipo de estudo:
Diagnostic_studies
/
Evaluation_studies
/
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
J Biomech Eng
Ano de publicação:
2003
Tipo de documento:
Article
País de afiliação:
Estados Unidos