Question

The near point of a person is at 40 cm from the eye. Find the power of the lens he should use while reading​

Answer 1

I am not sure but I think 3.5 D should use while reading.

Answer 2

Answer:

P = +1.5 D. So, the correct answer is “Option A”. Note: The convex lens used for correcting hypermetropia (or long-sightedness) should be of such a focal length (or power) that it forms a virtual image of the object (placed at a normal near point of 25 cm), at the near point of the hypermetropic eye.