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scientists track eye movements in glaucoma patients to check vision impairment while driving

This article is about the study of eye movement. For the tendency to visually track potential prey, see eye-stalking.

Eye tracking is the process of measuring either the point of gaze (where one is looking) or the motion of an eye relative to the head. An eye tracker is a device for measuring eye positions and eye movement. Eye trackers are used in research on the visual system, in psychology, in psycholinguistics, marketing, as an input device for human-computer interaction, and in product design. There are a number of methods for measuring eye movement. The most popular variant uses video images from which the eye position is extracted. Other methods use search coils or are based on the electrooculogram.

Yarbus eye tracker from the 1960s

Contents

• 1History
• 2Tracker types
  • 2.1Eye-attached tracking
  • 2.2Optical tracking
  • 2.3Electric potential measurement
• 3Technologies and techniques
• 4Data presentation
• 5Eye tracking vs. gaze tracking
• 6Eye tracking in practice
  • 6.1Eye tracking while driving a car in a difficult situation
  • 6.2Eye tracking of younger and elderly people in walking
• 7Applications
  • 7.1Commercial applications
• 8See also
• 9Notes
• 10References
  • 10.1Commercial eye tracking