This volume presents a state-of-the-art of current research on the role of eye gaze in different types of interaction, including human-human and human-computer interaction. Approaching the phenomenon from different disciplinary and methodological angles, the chapters in the volume are united through a shared technological approach, viz. the use of eye-tracking technology for measuring speakers’ and hearers’ eye gaze patterns while engaged in interaction. Envisioned as an ‘innovating reader’, the volume addresses key questions of interdisciplinary relevance (e.g. to what extent can the analysis of fine-grained eye gaze data, obtained with eye-tracking technology, inform conversation analysis, and vice versa?), positioning (e.g. what is the semiotic status of eye gaze in relation to linguistic signaling?), and methodology (e.g. can we strike a balance between experimental control and authenticity in setting up dialogue settings with eye-tracking technology?). The exploration of these and other questions contributes to the demarcation of a burgeoning research program.