Abstract: The present disclosure relates to an ignition interlock device and system for accurately detecting a drunk driver by running an interactive visual test presented for the driver to visualize on a screen of the alcolock device, which further comprises at least an eye gaze tracking module for recording eye movements and measuring gaze data, and a motor skill computing module for computing motion parameters from the sensor data measured during the interactive visual test. The alcolock device may further comprise a drunk detection module for measuring drunkenness of the driver by mapping gaze parameters and motion parameters to measure the mismatch between motor skills and cognitive processing performance, and a decision module for allowing the driver to drive the vehicle, or not, based on the measured drunkenness.