Q. 224.0( 5 Votes )

An old man cannot

Answer :

The person cannot see nearby objects and is able to see far objects clearly, so he is suffering from Myopia also called near sightedness also his least point of distinct vision is far than that of normal eye. To correct this type of defect concave lens or diverging lens are needed because image is formed in front of retina rather than on retina.

i. The ray diagram for the defect of vision of the eye is



The image is formed in front of retina.


ii. The ray diagram for correction of defect of vision is



By correction, the image is formed on the retina, for correction we use concave lens or diverging lens.

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