FOR 3D DISPLAYS, LENS ACCOMMODATION IS VARIABLE AND IT IS CONSISTENT WITH CONVERGENCE Topics: Display and Interaction Technology; Interface and Interaction Techniques for Visualization; Perception and Cognition in Visualization; Virtual Environments and Data Visualization In Proceedings of the International Conference on Computer Graphics Theory and Applications and International Conference on Information Visualization Theory and Applications - Volume 1: IVAPP, 780-783, 2012 , Rome, Italy