Some people cannot see objects at long distances but can see nearby objects clearly. This type of defect in vision is called ‘Myopia’ or ‘Near sightedness’.
- Myopia is corrected by using a con-cave lens of focal length equal to the distance of the far point F from the eye.
- This lens diverges the parallel rays from distant object as if they are coming from the far point.
- Finally the eye lens forms a clear in-age at the retina.
