What is meant by myopia? Write its causes and remedy with the necessary ray diagram.

Myopia is the defect of vision in which a person can see a nearby object but cannot see distant objects.

Its causes are:

  1. Due to the shorting of focal length high converging power of the eye lens.
  2. Due to the elongation of eyeballs.

Its remedy is:

  1. It can be corrected by using a concave lens of suitable focal length.