A display apparatus according to the present invention has a plurality of electroconductive layers outside of an image display area. The sleeve has, in one embodiment, a plurality of randomly positioned overlapping folds disposed in a sidewall of the sleeve. The method includes: receiving orientation information of the mobile device; and orienting the virtual camera in the three dimensional environment according to the orientation information. The base edge of each lateral face intersects the base edge of a contiguous lateral face to form a base point, the first face of at least one prism in the array including a first face first planar surface and a first face second planar surface. In addition, methods are provided for distracting the appropriate disc space during treatment of a disc in need of repair, and in particular treatment of the disc in need of repair with a fibrosis inducing agent. The connector has power output terminals for connecting the battery to the defibrillator and high voltage input terminals for applying a defibrillation voltage to the electrodes.