Conventional treatment of the cataract is the surgical replacement of the lens of impaired transparency by an artificial intraocular lens. This can provide considerable recuperation of the vision patients. Since the eye cannot focus the artificial intraocular lenses (IOLs), the latest IOLs have multiple focus, which enables patents to cover both short range and long range sharp vision. In this project we investigate through simultaions how, and what extent can the neural system adapt to the changed imaging properties of the implanted artificial lens, especially to the multi-focal ones.