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| EYE GAZE |
Using Eye Gaze control systems has become a realistic option
for providing computer access for people with severe physical
disabilities. For people with very
minimal, controlled movement for example people with Locked In Syndrome or
Motor Nuerone Disease (Amylotrophic Lateral Sclerosis), such technology has
provided access to communication, entertainment, safety, home control as well
as the standard functions offered by computers.
Eye Gaze Control systems work by using a range of cameras
mounted in a computer monitor to track your eyes as they move. The computer then, after a period of
training, associated this movement with the movement of the cursor on screen
thus giving the person control over the mouse.
Clicking is controlled either by the person blinking, or alternatively
dwelling in an area until the mouse automatically clicks.
Typically a person who wants to type, would use this system
to control a virtual keyboard on screen by moving their eyes, and consequently
the mouse to a particular letter and then selecting the letter by
clicking.
Such a mechanism for typing is obviously very slow, however,
new research by neuroscientist Jean Lorenceau at the Pierre-and-Marie-Curie
University in Paris, France, has found a way to write onscreen using your eyes
by using an optical illusion called "reverse
phi motion". The reverse phi effect
means that moving your eye in any direction while looking at the screen makes
it appear as if an on-screen dot is moving in that same direction, this makes
it possible to trace shapes onscreen in a continuous movement, thus providing a
person with the opportunity to draw letters, numbers and even pictures.
Such developments could see people with
significant motor disabilities extend how they use computers, giving
opportunities for a more creative expression through writing or indeed
producing art.
For more information click on the link below:
For profiles of people with a disability using this
technology click on the link below:
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