three professors at Cambridge University first developed the technique of iris recognition. In 1994, they invented computer software which could 'read' the iris- the coloured part of eye- to identify a person. It works because everybody's irises are unique and they do not change.
Although it is very new and expensive, people are beginning to use iris recognition to prevent crime and indentify criminals. For example, one US prison introduced iris recognition in order to be able to check that no prisoners had escaped. Banks worldwide have introced it to stop criminals stealing from other people's bank accounts. And some international airlines have installed it since the 2001 terrorist attacks in New York.
One American businessman, who flies regularly, said that it was a grat technique. He added that it was much safer than passport or ID cards. 'And you can't leave your eyes on the plane by accident!'he joked. Experts predict that we will all be using iris recognition in our everyday lives in the near future
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