An optical mouse is a computer input device that uses a light source, typically a LED, to detect movement relative to a surface. It works by capturing images of the surface beneath it and comparing them to determine the direction and speed of movement. This technology allows for precise control and is commonly used in both personal and professional computing. Unlike traditional mice that rely on a ball for movement detection, optical mice are more reliable and require less maintenance. They can work on a variety of surfaces, making them versatile for different environments. Many modern computers come with an optical mouse as a standard accessory.