What are disadvantages of using a mouse?

Optical mouses often perform poorly on polished or glass surfaces. Optical mouses often have bright lights embedded in them which some users may find annoying.

1. they need a flat surface to be used 2. they cannot be easily used with a laptop Eg : you can use a touch pad

There are no disadvantages to using a computer mouse, you can get computer mouses now without a wire, it's a Blue Tooth. or a Wi-Fi.

NO, there is no disadvantages of a mouse because it is invented to use computer easier[ Ahem. 1. Cannot be used with a command driven user-face OS2. May require excessive clicking to access menus and...