What is meant by hypermetropia? Write its causes and remedy with a necessary ray diagram.

Hypermetropia is a defect of vision in which a person can see distant objects clearly but cannot see nearby objects.

Its causes are:

  1. Due to the increase of focal length low converging power of the eye lens.
  2. Due to the contraction of the eyeball.

Its remedy is:

  1. It can be corrected by using a convex lens of a suitable focal lenght.