•The Eye gaze System is a communication
system for people with complex physical
•This operates with eyes by looking at
control keys displayed on a screen.
•With this system a person can synthesize
speech, control his environment , operate
a telephone, run computer software,
operate a computer mouse, and access
the Internet and e-mail.
Users of the eye gaze system
• The Eye gaze System is a direct-select vision-
controlled communication and control system.
• Edmund Huey built an early
eye tracker, using a sort of
contact lens with a hole for
the pupil. The lens was
connected to an aluminum
pointer that moved in
response to the movement of
•It was developed in Fairfax, Virginia, by LC
•With the help of an eye gaze system,
people whose communication abilities are
impaired can still express their feelings and
needs with a limitless vocabulary.
•This system is mainly developed for those who lack the
use of their hands or voice
•Its users are adults and children with cerebral palsy,
spinal cord injuries, brain injuries, ALS, multiple sclerosis,
Skills needed by the users
• Good control of one eye
• Adequate vision
• Ability to maintain a position in front
of the Eye gaze monitor
•The Eyegaze System must be
operated in an environment
where there is limited of
•The System works best away
from windows, and in a room
lit with fluorescent or
vapor lights, which are low in
SOME OF THE PRESENT DAY EYE GAZE
•Offer an unobstructed field of view with good
access to the face and head.
•Make no contact with the subject.
•Be easily extended to binocular recording
•Be compatible with head and body recordings
•Be easy to use on a variety of subjects.
•It is a sophisticated system with
a high tracking rate and
excellent working range.
• It can accommodate rapid or
•Intelligaze uses the latest camera
technology, very sophisticated
image processing and calibration
For people with limited eye control
Scanning Keyboard is the new row/column
keyboard with an on- screen eye "switch" for
people with limited eye movement.
Mental abilities that improve the
probability for successful Eyegaze use
•Ability to read
•Psychiatry /Mental Health
•Transportation: Flight simulators /driving simulators
•Robotics - remote vision control
•Video and arcade games
•Totally Free Head Motion
•Automatic Eye Acquisition
•Binocular Eye tracking
•High Gaze point Tracking Accuracy
•Easy User Calibration
The Eye gaze System’s Eyefollower2.0
•Today, the human eye-gaze can be recorded by
relatively unremarkable techniques. This thesis
argues that it is possible to use the eye-gaze of a
computer user in the interface to aid the control of
•Care must be taken, though, that eye-gaze tracking
data is used in a sensible way, since the nature of
human eye-movements is a combination of several
voluntary and involuntary cognitive processes.