Embodiments of the invention provide systems and methods for analyzing eye tracking data. A first lumen is adapted to receive a guidewire and can serve as a transport lumen for contrast agent. A potential difference between sources and drains of the transistors included in the memory cells of the non-selection state is thereby reduced, and the leakage current is eliminated. In response to location of the weather being within the region of space, the icon corresponding to the weather is presented on the display using a second icon format, the second icon format different from the first icon format. The replica output is electrically coupled to the calibration circuit. The first latch element has a housing-engaging element that engages the housing when the handle is in a forward position.