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While trackballs typically have
several buttons (click, double click, etc.), some have programmable
buttons
 This
Penny & Giles Trackball Plus ($350) also has buttons for
drag, horizontal/vertical direction, and speed - Sturdy device also has a handguard to help
locate and target buttons
- Ball of trackball can be rotated using a
finger, hand, or pointing device
- Popular alternative to the traditional mouse
- Latching button enables user to perform the
drag function without needing to continually depress the button
– provides increased access for one - finger users access
to software dependent on the drag function
- Placing dycem under the trackball can increase
stability
- The SAM (Switch Adapted Mouse) trackball
by R.J. Cooper ($164) has a built-in jack for a switch. With
a switch, the user is able to perform mouse clicks or other
functions, activated by the hand or other parts of the body.
Joysticks
- Children who use power wheelchairs or play
video games may already be familiar with these devices
- Some joysticks allow for movement in 360°,
while others have movement limited to up, down, left and right
- Some joysticks have programmable control
buttons, differing force requirements, or can be operated
by the chin or head
Penny & Giles Joystick Light $375
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