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Presbyopia and Its Correction

A person can ...

Question

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

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Solution

(a) Presbyopia
(b) Hypermetropia

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Q. 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

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

Q. A young man has to hold a book at arm's length to be able to read it clearly. The defect of vision is :
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Q. An old man cannot see objects closer than 1 m from the eye clearly. Name the defect of vision he is suffering from. How can it be corrected? Draw ray diagram for the (i) defect of vision and also (ii) for its correction.

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