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Presbyopia

Why we will u...

Question

Why we will use concave lens for myopia? Why not convex lens?

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Q. Which lens is used to correct myopia−convex or concave?

Q. Choose the correct answer from the alternatives given in the brackets.
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(Convex lens, Concave lens, Concave mirror, Convex mirror)

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Why focal length of convex mirror and convex lens is positive while concave mirror and concave lens negative?

Q. A person is unable to see the objects placed beyond 2.5 m clearly. What is the defect of vision he is suffering from? Suggest a corrective lens for his defect.

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