Abstract: An eye-tracker (40) comprising: an imaging system (41) configured to capture images (41_o) of a user's eyes (11, 12), said images comprising information of the user's point of gaze on a display (25, 35) of a computer device (20, 30); a processing module (42) for processing the images (41_o) captured by the imaging system (41) and providing processed data comprising structured information (42_o); a multi-platform module (43) for converting the processed data comprising structured information (42_o) into data comprising serialized structured information (43_o) in a format understandable by a plurality of operating systems; and a connection module (60) coupled to an input/output port (51) of the eye-tracker (40) for connecting the eye-tracker (40) with a computer device (20, 30). A system comprising an eye-tracker (40) connected to a computer device (20, 30). A method for connecting an eye-tracker (40) and a computer device (20, 30).