Computer applications can be controlled by gazing at the computer screen. For people with disabilities, gaze controlled applications have been largely used for communication, entertainment, education, and many other purposes.
In the COGAIN wiki pages, you will find information about gaze interaction systems and applications that have been specially designed for people with disabilities.
PS.
The person pictured in the banner is Kati van der Hoeven, who has been an active member in COGAIN for a long time, representing people with disabilities. Read how Kati affected the work of COGAIN from the very beginning: https://wiki.cogain.org/index.php/Visiting_Kati