Question

1) What is hypermetropia or farsightedness ? What are the possible
reasons of hypermetropia ? How is hypermetropia corrected ?
Explain with diagram.​

Answer 1

HYPERMETROPIA

Hypermetropia is also known as farsightedness. A person with highway moto period can see distant objects clearly but cannot see nearby objects distinctly. The near point for the person is farther away from the normal near. Such a person has to keep a reading material much beyond 25 cm from the eye for comfortable reading.

Reasons:

This is because the light rays from a closed by object are focused at a point behind the retina. This defect arises because-

• the focal length of the eye lens is too long,or,
• the eyeball has became too small

Correction:

This defect can be corrected by using convex lens of appropriate power. Eyeglasses with converging lenses provide the additional focusing power required for forming the image on the retina.

$\: \: \: \: \: \: \: \: \: \: \huge \bold{@WildCat7083 }$

Answer 2

• A person can see distant object clearly but not unable to see near object. In Hypermetropia near point of eye shift away from eyes.
• Cause of Hypermetropia

1. Decrease the size of eye ball.
2. Increase the focal length office eye lens.

• Correction of Hypermetropia
• Hypermetropia eye corrected by suitable of focal length of convex lense.