My Dad is mostly bedbound and uses a standard mouse on top of his sheets to interact with his computer through his TV. I think some sort of presentation mouse would be better, but I am confused by about which to pick. Many of the presentation meases I see seem to be mere 'clickers' and incapable of usefully manipulating the cursor as a standard mouse would. There should be some product out there that lets a person navigate their mouse cursor with a minimum of movement or effort from their hand. It just makes sense that someone would have designed something that a presenter could hold and subtly move a cursor around a screen. Any advice on a specific product?