Biomechanics is the application of mechanics to biological systems. It helped to provide more understanding of normal tissue function, the effect of pathology, and the impact of treatment. The biomechanics research also is an important method to understand the prevention, onset and treatment of eye diseases. Eye ball is a closed globe which undergoes pressure from intraocular or extraocular. The pathology of eye will affect its biomechanics. Recent years, several methods about biomechanics were used to study eye diseases, such as corneal collagen crosslinking for treatment of keratoconus and corneal ectasia, posterior sclera reinforcement for treatment of pathological myopia, and so on. Here we reviewed the biomechanical research of extraocular muscle, cornea, sclera, iris and lens.