Current advance on corneal biomechanical research

Abstract:

Cornea is a soft tissue of human, it has the features of stress-strain curve, stress relaxation curve and creep. As aviscoelastic tissue, it has the biomechanical properties such as elastic modulus, corneal hysteresis(CH), shear modulus and lag effect. Nowadays, clinicians pay more attention to the correlation between corneal biomechanics and clinical application. Ocular response analyzer(ORA) is more convenient and practical than other methods in measuring corneal biomechanics, so it is widely used in clinic. For instance, assessing photorefractive keratectomy surgery, keratoconus, glaucoma and so on. The biomechanical features, development in measuring methods and clinical application are reviewed.

Key words:cornea; biomechanics; ocular response analyzer; coneal hysteresis