  Upper limb disability may be caused either due to accidents, neurological
disorders, or even birth defects, imposing limitations and restrictions on the
interaction with a computer for the concerned individuals using a generic
optical mouse. Our work proposes the design and development of a working
prototype of a sensor-based wireless head-mounted Assistive Mouse Controller
(AMC), Auxilio, facilitating interaction with a computer for people with upper
limb disability. Combining commercially available, low-cost motion and infrared
sensors, Auxilio solely utilizes head and cheek movements for mouse control.
Its performance has been juxtaposed with that of a generic optical mouse in
different pointing tasks as well as in typing tasks, using a virtual keyboard.
Furthermore, our work also analyzes the usability of Auxilio, featuring the
System Usability Scale. The results of different experiments reveal the
practicality and effectiveness of Auxilio as a head-mounted AMC for empowering
the upper limb disabled community.
