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    Question

    Which lens is used to correct myopia

    (shortsightedness)?  
    A Convex lens Correct Answer Incorrect Answer
    B Concave lens Correct Answer Incorrect Answer
    C Cylindrical lens Correct Answer Incorrect Answer
    D Plane lens Correct Answer Incorrect Answer

    Solution

    Myopia causes distant objects to appear blurred.   Concave lenses diverge light rays, helping the eye to focus correctly.   They are thinner at the center than at edges.   Power of such lens is measured in negative diopters.

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