PREMIUM --

File photo dated 11/1/03 of a nurse supervising an eye test at the diabetes clinic at St. Thomas' Hospital in central London. More than half of all sight loss is avoidable, the Royal National Institute for the Blind (RNIB) claimed Tuesday January 24, 2006. There are 1.9 million diabetics and 250,000 people with early-stage glaucoma at risk of losing their sight in the UK. See PA story HEALTH Sight. PRESS ASSOCIATION Photo. Photo credit should read: Chris Young / PA.