According to conventions, the power of corrective lens used for which defect has a positive power?

Myopia

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Hypermetropia

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Cataract

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None of these

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Solution

The correct option is B Hypermetropia
For hypermetropia, we use a convex lens which has a real focus and according to conventions focus of a convex lens is positive.

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According to conventions, the power of corrective lens used for which defect has a positive power?

The correct option is B HypermetropiaFor hypermetropia, we use a convex lens which has a real focus and according to conventions focus of a convex lens is positive.

The correct option is B Hypermetropia
For hypermetropia, we use a convex lens which has a real focus and according to conventions focus of a convex lens is positive.