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To investigate the flexible adaptation of human visual system, we developed a system to provide different view fields to both eyes of a user respectively. The system named "Virtual Chameleon" consists of two CCD cameras independently controlled and a head-mounted display was used by twelve healthy volunteers. Eleven of them became able to independently control visual axes and understood two different views. The successful users of the system were able to actively control visual axes by manipulating 3D sensors held by their both hands, to watch independent view fields presented to the left and right eyes, and to look around as chameleons do. The results raise interesting question on adaption to provided two independent view fields.
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