A mother paralysed from the neck down has rebuilt her life thanks to a computer that works by tracking her eye movements.   Sarah Ezekiel, who has motor neurone disease, uses the technology to talk, email, book appointments and contact friends and family.  But she has also managed to continue her hobby of painting – and has become such a success that she now has her own exhibition.   The computer, called a Tobii Eyegaze, works by tracking eye movements via an infrared bar, giving users full mouse control with their eyes.   Users simply look at the computer screen and control the mouse cursor with their eye movements. They can then select by blinking or staring for a prolonged period. [Read more...]