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Recent advancements in eye tracking technology are driving the adoption ofgaze-assisted interaction as a rich and accessible human-computer interactionparadigm. Gaze-assisted interaction serves as a contextual, non-invasive, andexplicit control method for users without disabilities; for users with motor orspeech impairments, text entry by gaze serves as the primary means ofcommunication. Despite significant advantages, gaze-assisted interaction isstill not widely accepted because of its inherent limitations: 1) Midas touch,2) low accuracy for mouse-like interactions, 3) need for repeated calibration,4) visual fatigue with prolonged usage, 5) lower gaze typing speed, and so on.  This dissertation research proposes a gaze-assisted, multimodal, interactionparadigm, and related frameworks and their applications that effectively enablegaze-assisted interactions while addressing many of the current limitations. Inthis regard, we present four systems that leverage gaze-assisted interaction:1) a gaze- and foot-operated system for precise point-and-click interactions,2) a dwell-free, foot-operated gaze typing system. 3) a gaze gesture-basedauthentication system, and 4) a gaze gesture-based interaction toolkit. Inaddition, we also present the goals to be achieved, technical approach, andoverall contributions of this dissertation research.

A Gaze-Assisted Multimodal Approach to Rich and Accessible Human-Computer Interaction