Astigmatism can be rectified by a suitable ..........lens.

concave

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convex

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cylindrical

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None of the above

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Solution

The correct option is B cylindrical
A suitable cylindrical lens rectifies astigmatism. Astigmatism is caused due to irregular curvature of the cornea leading to poor distant vision. A cylindrical lens oriented at a certain angle will correct the irregularity.

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[CPMT 1972; MP PET/PMT 1988; CBSE PMT 1990]

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