Jack Karnehm (18 June 1917, Tufnell Park, north London, England – 28 July 2002, Crowthorne, Berkshire) was a British snooker commentator, who was regularly heard on BBC television from 1978 until 1993, and a former amateur world champion and professional national champion at the game of English billiards.Karnehm was also a professional snooker and billiards player.Besides his commentary, perhaps his major contribution to the game was his development of the swivel-lens glasses, which enabled Dennis Taylor to win the World Snooker Championship in 1985.