Ergonomic accessories include: Graphic tablets and computer touch pads to reduce hand and wrist movement associated with mousing; gel touch mouse pads to help support the wrist and hands; foot pedals for a hands-free mouse as an alternative to the standard mouse; and copy holders to reduce neck and eye strain.  These products have been designed to lessen the effect leading to Repetitive Strain and Carpal Tunnel Syndrome. Using computer egronomics is the best way to make sure you are preventing pain and reducing it.