[The biomechanical properties of sclera after posterior sclera reinforcement operation]

This study sought to characterize the biomechanical properties of rabbit sclera after posterior sclera reinforcement operation (PSR), which may provide valuable information for PSR in clinical setting. Uniaxial tension and ball-pressing methods were used. Different areas of the sclera samples from PSR were examined in pretest, relaxation and creep experiments respectively by using Instron5544 mechanical machine. The experimental results showed: When the implanted area of sclera samples was compared with that of other groups, the unit width stiffness coefficient increased remarkably at the linear stage, and the anti-deformation capacity was higher at the relaxation stage. However, the creep rate showed a significant decrease at the creep stage. That is to say, PSR could enhance the anti-deformation capacity of the weakened and thinned sections, reduce the sclera creep rate in the posterior sclera, and thus prevent the development of progressive myopia.