At age 45, a person is fitted for reading glasses of power 2.1 D in order to

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At age 45, a person is fitted for reading glasses of power 2.1 D in order to read at 25 cm. By the time she reaches 55, she discovers herself holding her newspaper at a distance of 40 cm in order to see it clearly with her glasses on.

(a) Where was her near point at age 45?

(b) Where is her near point at age 55?

(c) What power is now required for the lenses of her reading glasses so that she can again read at 25 cm?


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