Gaze in the context of interactive systems plays a vital role in Human-Computer Interaction (HCI). Gaze-aware systems provide support for users with physical disabilities, are employed as a game input device, or serve as an input form in public settings. The installation introduced in this work, called "Blind Spot", reflects these developments by using gaze in an art context by partially obscuring the user's field of view (i.e., the current gaze position). In doing so, the installation illustrates the potentials and characteristics of eye-tracking technology. It aims at fostering discussions about new design possibilities for gaze-based interactions in the arts and academia. Furthermore, it makes spectators aware of how visual information is processed by humans (i.e., only a small fraction with high visual acuity is perceived at a given moment). Thirdly, it addresses the human's desire to retrieve a complete picture of a given scenery (i.e., revealing this desire by limiting the spectator's perception capabilities).