Compensation of downbeat nystagmus with a modular controller

In this study a modular control approach is used to provide target following ability for a patient eye suffering from downbeat nystagmus. To perform the task successfully, it is proposed to exploit the benefits of modular strategies. Therefore, vertical eye movements are decomposed to two distinct upward and downward motions, and the controller tries to dedicate each of them to one distinct module autonomously. By this way, target following task is apportioned between modules and each module's contribution is to learn and control one single subtask. Consequently, perfect target following, confirms the performance of the proposed approach.