Ramesh looking at the net of crossed wires is able to see the vertical directions more clearly than the horizontal wires; with what defect of vision Ramesh is suffering ? How is such defect of vision corrected ?
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Explanation:
The person is suffering from Astigmatism. It is a defect caused due to the imperfection in the curvature of cornea. In this defect, a person is able to focus objects with in one direction only and is unable to do so in its perpendicular direction.
Astigmatism is corrected with the use of a cylindrical lens.
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