Question

An old man cannot see objects closer than 1 m from the eye clearly. Name the defect of vision he is suffering from. How can it be corrected? Draw ray diagram for the (i) defect of vision and also (ii) for its correction.

Answer 1

Answer:

hypermetropia is the defect of visions from which he suffer it's correction is by using convex lens.

Answer 2

Hypermetropia

Explanation:

An old man cannot see objects closer than 1 m from the eye clearly. So he must be suffering from hypermetropia, also known as farsightedness. He cannot see nearby objects clearly because the lens in his eye lacks the power to converge the rays from nearby objects on his retina. The rays tend to converge at a point outside the retina and hence the difficulty in his vision. An external converging lens is used to focus the rays on the retina, thus correcting the problem.