| To study the mechanical behavior of ocular muscles is very useful for the diagnosis and treatment of some diseases of the eye. Along with the wide application of modern finite element numerical method, the finite element analysis method has been more and more applied in medical clinical research. Are introduced in this paper finite element modeling method and numerical calculation method of vertical eye transfer process, superior rectus muscle force and deformation are analyzed, and provides a theoretical basis for the diagnosis and treatment of vertical strabismus extraocular muscle diseases. The main contents of this paper are as follows:(1) with ABAQUS finite element analysis software established under the action of superior rectus three-dimensional eyeball movement model, with reports in the literature of the extraocular muscles in the primary position of eye nerve excitability level mechanical constitutive as input, using ABAQUS finite element software to the eye under the vertical rotation process straight muscle mechanical response are analyzed. Respectively, to simulate the vertical eye around 3 degrees, 6 degrees and 9 degrees, 12 degrees, 15 degrees and 18 degrees, the stress condition of the superior rectus muscle, superior rectus muscle model of stress nephogram. The results showed that in the eye under the vertical turn, superior rectus muscle and eyeball position tangent to the maximum stress. With increase of the eye under the vertical rotating angle, superior rectus maximum stress value gradually increases, when the vertical eye around 18 degrees, superior rectus maximum stress reaches a maximum for 49 kpa.(2) In the process of eyeball turning 30°along the vertical direction, the force and deformation of superior rectus were calculated by the constitutive equation. The results showed that the force and deformation of superior rectus increased linearly along with the vertical rotation of eyeballs. |
PDF Full Text Request