With the Eye Line tool, an athlete can more precisely and quickly localize an object in space by accurately aligning the visual axes of both eyes on a single target. The target string can be moved from primary gaze to other positions that simulate the unique ocular alignment demands of a particular athlete’s sport, such as golf or baseball. The spring loaded, button actuated reel allows the user to deploy visualization beads on the target string at user determined intervals while the tether-end magnetically attaches to user-mounted hooks.