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An intraocular lenses (IOLs) implanted in the eye is used to treat diseases such as cataracts or myopia. This chapter examines the problem of cataract healing while preserving the natural accommodation of the eye. The aim of this work is to model the system of IOLs, which has the possibility of accommodation, as well as the natural lens. The SpaceClaim CAD system was used for direct 3D modeling of an IOL with elastic haptic elements and the ANSYS Mechanical environment for creating a finite element mesh and a numerical model of deformations.

In the work mathematical and computer modeling the operation instrument, which is used in the operation to replace the lens are carried out. The tip of a lensotome, which is a hollow cylinder that vibrates axially is considered. Oscillations are excited by a piezoelectric element. A modal analysis of the structure is carried out, the frequencies of resonance, antiresonance and the coefficient of electromechanical coupling (CEMC) are found. An analysis of the values of this coefficient and natural modes of vibration allows us to select the operating frequency of the instrument, at which there is an effective conversion of electrical energy into mechanical and intensive movement of the lensotome tip end, which acts on the tissue of the lens during its fracture.