When optical mice, which use image sensors to detect movement, were first glamorous into the market, they just special mousepads with optical patterns printed on them. Latter-day optical mice can function to an acceptable gradation of Go accuracy on plain paper and other surfaces. However, some optical mouse users may prefer a mousepad for comfort, speed and accuracy, and to avert wear to the desk or table surface.
Originally, mousepads were available in a simple rectangular shape. In recent years, though, they have been accessible in copious shapes and designs. Ergonomic designs are gettable with built-in wrist rests trumped-up of silicone gel, foamed and beaded materials.