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The World Health Organization estimates that around 285 million people are visually impaired worldwide and about 90 per cent of them live in developing countries. To help the poorest people, a team of doctors from the London School of Hygiene and Tropical Medicine is trialling a smartphone app called Peek (Portable Eye Examination Kit) in Kenya.


The technology - which can diagnose cataracts and other eye-related problems - is simple to use, relatively cheap and could revolutionise access to eye treatment.

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