This is eye tracking

Tobii about eye tracking

A device or computer equipped with an eye tracker “knows” what a user is looking at. This makes it possible for users to interact with computers and machines using their eyes.

With eye tracking a device can understand what the user pays attention to, what information the person has processed, and it can give indications about the person’s presence, attention, focus, drowsiness, consciousness or other mental states. This information can be used to gain deep insights into consumer behavior or design new user interfaces for computer games, standard computers, cars and other devices.

Key benefits with eye tracking

  • Understand human behavior – The human brain accumulates the majority of the impressions that it processes using vision. With the ability to observe a user’s gaze, it is possible to obtain deep insights into the person’s attention and, based on this, conclude driving factors behind their behavior and actions.
  • Enable hands-free interaction – By using the eyes as an input to a computer, as a “pointer” on a computer screen, eye tracking facilitates interactions with computers when the user cannot or does not wish to use hands as the input form.
  • Create new user experiences and humanized user interfaces – By combining eye tracking with other input modalities, for example keyboard, touchpad and voice commands, it is possible to create new user experiences and innovative interfaces for mainstream consumer devices. These interfaces can be more intuitive, natural, engaging and efficient than conventional user interfaces.

How eye tracking works


Most eye trackers are comprised of three main components:

  • a set of illuminators or projectors
  • one or more cameras
  • algorithms for image processing and mathematical calculations

These algorithms are run on either a dedicated processing system or on the processor of the host computer to which the eye tracker is connected.

The eye tracker can determine with a high degree of accuracy where the user is looking, the position of the user’s eyes, the presence of the user and the size of the user’s pupils.

Software applications for eye tracking

Eye-tracking applications for In addition to the core eye tracking technology, there is also a need for application software that makes use of the data from the eye tracker. Such application software can provide tools for analyzing and understanding human behavior or can be used to create new user experiences and user interfaces.