Observe the diagram given and answer the question asked.
b. What is the cause of this defect?

Explanation

The cause of this defect are:
i. The curvature of cornea and eye lens increases.
ii. The converging power of lens remains large due to decreased focal length.
iii. The distance between the lens and retina increase due to elongation of eye ball. ltbr. iv. The far point of the eye is not at infinity but has shifted closer to the eye.