Optical mouse
Computer mouse that utilizes light-emitting diodes (LED) or laser as a method of tracking movement,
which make them more proficient than earlier mice. These mice are easily identified by examining the bottom of the mouse
as shown in the picture to the right, which shows an optical-mechanical mouse
with a ball and an optical mouse with a light emitting from the bottom.
Drawbacks of some optical mice include working properly in rooms with bright lights and on some surfaces such as a glass table. However, in comparison to optical-mechanical mice are a much better solution.
Also see: Mouse definitions, Optical-mechanical mouse