ABSTRACT
Developing a fast and intuitive communication gaze-input method is one of the main challenges of eye-tracking research. The primary problem concerning a gaze system for selective application is that it should be able to discriminate between explorative and intentional inputs. In the literature, many gaze-based interactive systems using gaze tracking as a primary input control have been shown. In particular, the chapter focuses on a case study design of gaze text-entry technology, that is, a predictive graphic user interface for writing and communicating by means of the eyes. The interface has been developed by Cogisen, who designed it using new information visualization methods and techniques aiming at preventing gaze shifting from a display keyboard to lists of graphic elements and simplifying items selection among wide sets of words and phrases. The system can be used by people with residual eye motor abilities, residual language comprehension, decoding and production ability, and symbolic communication ability.
