A person can read a book clearly only if he holds it at an arm's length from him. Name the defect of vision :
(a) if the person is an old man `" "` (b) if the person is a young man

A young man has to hold a book at arm's length to be able to read it clearly. The defect of vision is :

If a person can see an object clearly when it is placed at about 25 cm away from him, he is suffering from

An aged person is having difficulty in seeing nearby objects clearly. Name this defect of vision.

A person cannot see distinctly the book placed nearer than 60 cm from his eyes. (i) Name the defect of vision the person is suffering from. (ii) List two possible causes of this defect. (iii) Draw a ray diagram to show this vision defect. (iv) How can this defect be corrected ? (v) Draw a ray diagram to show the correction of this defect.

A person cannot see the distant objects clearly (though he can see the nearby objects clearly). He is suffering from the defect of vision called :