1. It is the defect in which human eye can see distant
objects clearly but is unable to see nearby objects clearly.
2. The image of near object falls behind retina. Two
possible reasons of Hypermetropia are :
a. Weak action of ciliary muscles causes low converging
power of eye lens.
b. The distance between eye lens and retina decreases on
account of either shortening of eyeball or flattening of lens. In this case
focal length of the eye lens is too long.
3. A convex lens of suitable focal length can correct
this defect.
4. The rays coming from nearby object are first converged
by convex lens and then converged by eye lens to retina.
