Sawaal
9
Q:

Which lenses should be used to correct the defect of astigmatism?

A) Convex lens B) Bifocal lens
C) Concave lens D) Cylindrical lens

Answer:   D) Cylindrical lens



Explanation:

Astigmatism is a common vision condition that causes blurred vision. It occurs when the cornea is irregularly shaped or sometimes because of the curvature of the lens inside the eye.

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