What is far-sightedness or hypermatropia? What cause hypermetropia How this defect is corrected ?

Explanation

For-sightedness ro hypermetropia : Hypermetropia is the defect of the eye vision due to which a person can see tha distant object clearly, but cannot see near object clearly.
Causes of hypermetropia : Hypemetropia is caused due to
(i) the size of the eye-ball becoming too short.
(ii) increase in the focal length of the eye lens. The lens becoming too thin.

Correction of defect : This defect can be corrected by using a convex lens of suitable power. Which bring the image back on to the retina and thus the defect is corrected.