Real Eyes, Realise; Real Design Principles for the Use of Blinking Mechanics in Games

This thesis explores how blinking detection can be made more usable and accessiblein video games. Through a design science research approach grounded in human-computerinteraction, the study develops and evaluates five design principles for integrating blinking asan input method. A horror game prototype, Vigil, was created to test each principle,calibration, feedback, fatigue, accessibility, and environmental conditions, by isolating themacross different prototype variations. These were evaluated through playtesting andsemi-structured interviews, followed by thematic analysis to identify recurring usabilitypatterns. Findings suggest that while blinking detection can increase immersion, it alsopresents challenges related to user comfort, responsiveness, and environmental variability.The resulting design principles aim to support game developers experimenting withalternative input methods and contribute to broader conversations on accessible interactiondesign. Although tested within a horror game context, the principles are intended to beapplicable across genres.