• Generally, eye trackers are devices used for determining various parameters related to eyes of users which include point of gaze, pupil size, iris size, eye location, etc.
• The eye trackers are majorly available in three broad forms which include head-mounted eye trackers, screen-mounted eye trackers and remote eye trackers. Further, these eye trackers lack the capability of tracking multiple users simultaneously.
• Thus, the desired problem has been addressed by the present invention by providing human performance monitoring in user interaction with products for market and scientific research.

• The technology provides a device and method for simultaneous multi-user eye-tracking in an environment having multiple regions of interest based on gazing direction of multiple users, in real-time.

The eye tracker system consists of

1. Multiple cameras with lenses and IR bandpass    filters, Illumination sources and associated driver circuits.
2. Optics controller for the light sources and cameras.
3. Compute unit to analyze the images from the cameras and to provide inputs to the optics controller.
4. Power source to supply power to the illuminators.
5. The device provides user specific calibrations to have high accuracy in gaze estimation over multi-screen environments.