What power of reading glasses should be prescribed for her

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A person struggles to read by holding a book at arm's length, a distance of 49cm away.What power of reading glasses should be prescribed for her, assuming they will be placed 1.9cm from the eye and she wants to read at the "normal" near point of 25cm ?

Reference no: EM131026492

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What power of reading glasses should be prescribed for her : A person struggles to read by holding a book at arm's length, a distance of 49cm away. What power of reading glasses should be prescribed for her, assuming they will be placed 1.9cm from the eye and she wants to read at the "normal" near point of ..
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