Article in the Telegraph
"An eye test is the only way to diagnose glaucoma, the leading cause of blindness in Britain.
Around 500,000 people in this country currently suffer from the condition, in which the eyes optic nerve becomes damaged over time.
Sufferers can lose up to half of their peripheral vision before they realise something is wrong.
Experts at the Moorfields Eye Hospital, in London, the International Glaucoma Association, the Eye Health Alliance, the Royal National Institute for Blind people, warn that early detection of the disease is crucial to preventing sight loss."