In the context of MultiARC, Ubimax deals with the visualization and interaction of AR models for microsurgical interventions. To achieve this, different data sources are integrated to display a consistent interface. Information like therapy details and vital parameters are situated precisely in the surgeon’s field of view with the aid of an HMD. The focus is on the size determination and positioning of tympanic prostheses. Another goal includes a telepresence system, enabling the consultation of remote experts. The experts see the same picture as the surgeon and can support him during the procedure.