Question

Differentiate between the following pairs on the basis of what is mentioned within brackets:

(b) Near vision and Distant vision (Shape of the lens)

Answer 1

Near vision: It is also called myopia or short sightedness where a person is able to view near by objects clearly but not distant objects.

Distant vision: It is also called hypermetropia or long sightedness where a person is able to view distant objects clearly but not near by objects.

Near vision	Distant vision
1.It is due to the elongation of the eyeball and lens becoming convex.	1.It is due to the shortening of the eyeball and lens becoming too flat.
2. Image is formed in front of the retina instead of on the retina and can be corrected by using concave lens.	2.Image is formed behind the retina instead of on the retina and can be corrected by using convex lens.