Haptic mouse

From ATWiki

Haptic mice are a new invention that provides feedback to the user. The mouse or stylus is mounted on an arm that provides resistance or vibrates as the cursor is moved over various lines on the screen. Although there is not yet much software that works with these devices, they may someday be useful for people with visual impairments because of their potential to let the user "feel" what is on the computer screen.

See the Mouse alternatives article for more cursor control options.