Over the last two decades, researchers have demonstrated the potentials in using eye gaze data for various tasks across fields of human endeavor. In this light, Remote Eye Gaze Tracking Systems (REGTs) rose to popularity with the presentation of several hardware and software modules intended for the Point of Gaze (POG) estimation task. This paper presents a paradigm shift in REGTs research from past to recent progress point of view. Our findings and discussions are focused on hardware, software, and application areas of REGTs, which we hope will benefit current and future researchers in this field.