Disclosed are high numerical catadioptric objectives without a central obscuration, and applications thereof. In one embodiment, the electronic device includes a substrate, a plurality of conducting lines formed on a first conducting material that is disposed on the substrate, and a layer of a second conducting material disposed on the plurality of conducting lines. The recipient may interact with the displayed content and functional objects; as these interactions create a demand for more data on the message content, the BSP file is queried for links to that content, and it is transmitted from the sender, as required by the recipient. The stent delivery system can also include a handpiece adapted to selectively deliver the stents.