. A student has difficulty in reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be

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Ans. Since the child cannot see the blackboard writing clearly, he is suffering from 'myopia' or 'short-sightedness' i.e. he can see closer things with naked eye but not distant things. Myopia can be corrected by using spectacles with concave lenses of appropriate power.

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