BERLIN (Reuters) - Officers soon saw through a German driver who posed as an acquaintance when he was stopped for drunk driving -- he forgot his alter ego had a glass eye, police said Tuesday.

Police in the western city of Bochum said the driver's details seemed to be correct when he told them who he was -- until their records showed the man matching his description was registered as having a glass eye. A torch beam shone in face soon disproved this, however.

"His eye responded to stimulus. So then he said he used to have a glass eye, but didn't any more," said a Bochum police spokesman.

"It seems he was impersonating someone he knew well.

A search uncovered the man's true identity, and that he had already lost his license for a previous offence.