【明報專訊】Old Pedro was a poor man from a poor country, who had received a special present. It was money for an operation from his son in Canada. You see, old Pedro had had cataracts (白內障) for many years. Now he could see nothing much, just light and dark, and bright colours. Of course, people helped Pedro. His wife looked after him like a son. Neighbours helped him cross the road. Shopkeepers gave him a good price.