Mouse

A mouse is a hand-operated pointing device that translates relative motion across a flat surface into movement of an on-screen cursor, with one or more buttons and usually a scroll wheel for selection and additional commands. It is the dominant pointing device for desktop computing and the implicit baseline that other input methods are compared against in human-computer interaction research. From an accessibility standpoint the mouse poses well-documented barriers for users with motor, vision, and cognitive impairments — small targets, the need to click while holding still, and the requirement for hand-eye coordination — and is typically supplemented or replaced by trackballs, joysticks, head pointers, switch scanning, eye trackers, voice control, or touch and gesture interfaces. WCAG 2.1 Success Criterion 2.5.1 (Pointer Gestures) and related criteria require that interfaces not depend on mouse-specific behaviours.