Improving and Analyzing Sketchy High-Fidelity Free-Eye Drawing

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Some people with a motor disability that limits hand movements use technology to draw via their eyes. Free-eye drawing has been re-investigated recently and yielded state-of-the-art results via unimodal gaze control. However, limitations remain, including limited functions, conflicts between observation and drawing, and the brush tailing issue. We introduce a professional unimodal gaze control free-eye drawing application and improve upon free-eye drawing by extended gaze-based user interface functions, improved brush dynamics, and a double-blink gaze gesture. An experiment and a field study were conducted to assess the system's usability compared to the mainstream gaze-control drawing method and hand drawing and the accessibility among users with motor disabilities. The results showed that the application provides efficient interaction and the ability to create hand-sketch-level graphics for people with motor disabilities. Herein, we contribute a robust and professional free-eye drawing application, detailing valuable design considerations for future developments in gaze interaction.