Hoodwink.

Hoodwink is based on the true story of an Australian con artist who briefly won the hearts of the media (if not the authorities). John Hargreaves stars as a criminal serving time in a New South Wales prison. He's not partial to the physical labor required of the convicts, so he hits upon a labor-saving plan. Hargreaves pretends to be totally blind, thus lightening his work load....and carries off the hoax for years.