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The near point of a hypermetropic eye is...

The near point of a hypermetropic eye is 75 cm. What is the focal length of the lens required to see clearly an object placed at 25 cm from the eye (normal near point)?

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The focal length of convex lens used for correcting the hypermetropic eye is given by
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The far point of a myopic eye is 100 cm. What is the focal length of the lens required to see very distant (normal far point) objects clearly?

Make a diagram to show how hypermetropia is corrected. The near point of a hypermetropic eye is 1 m. What is the power of the lens required to correct this defect? Assume that the near point of the normal eye is 25 cm.

Knowledge Check

  • What is the focal length of lens if the image distance remain same by keeping object at 24 cm and 16 cm from lens ?

    A
    22 cm
    B
    20 cm
    C
    18 cm
    D
    none of these

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