The monocle is worn in front of the eye and reflects scanned laser light to the eye allowing mechanics to view car diagnostics and instructions superimposed on their field of vision.

"Service technicians use it so that they can work on an engine and their view is superimposed on what they are seeing," Mr Goldstein told the BBC programme, Go Digital.

"They don't have to get up from what they are doing and go to a separate computer terminal or flick through a manual. They have it right where they need it."