Position shift of phosphene and attention attraction in arbitrary direction with galvanic retina stimulation

Recently, a Head Mounted Display (HMD) has become popular in applications such as Virtual Reality (VR) and Augmented Reality (AR). For example, Google Glass and Microsoft HoloLens are popular as HMDs specialized for AR. The HMDs for AR give information by convoluting annotations with objects in the real world. Therefore, the objects to attach annotations are required to exist within the range HMDs can present images. However, the devices can mostly present a narrow range of images. Thus, an HMD user cannot frequently obtain necessary information because the object on which an annotation should be displayed does not exist within the visual field range of the HMD. Then, if the head of the user is guided so that the object enters within an HMD's visual field range, the problem will be solved without increasing the weight of the devices. In this work, we focus on the visual presentation method called Galvanic Retina Stimulation (GRS), and we verify the effect using GRS for presenting a clue to guide the subjects' heads.