The challenge

The client has multiple sclerosis and is no longer able to use his hands and arms. He wishes to continue to use his computer and requires a pointing device.

A SmartNav AT system was purchased by the client. This consists of a ‘camera’ fixed at the top of the monitor and a reflective dot fixed on the bridge of the client’s glasses. The system works by projecting an infrared beam which reflects back from the dot to the camera. Movements of the client’s head move the cursor in the same way as if it was moved by a mouse. Mouse clicking is emulated by the cursor being moved to one of a set of buttons on the screen and held there for a second. The cursor is then moved to the icon or button required to be clicked. There is also an on-screen keyboard which works in a similar way to the click buttons.


The client can use his computer independently.