Blindness from causes treatable by modern medicine afflicts millions of people every year. Cataracts, the single largest cause of preventable blindness, can be treated by a simple and quick surgical procedure that restores sight; sadly, extreme poverty and its consequences limit access to the medical technologies and infrastructure needed for the surgery. As a result, the crush of blindness continues unabated worldwide.
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Ibrahim et al. (2006) studied this question.
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