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For a patient, a doctor prescribes glasses with a converging lens having a refractive power of...

For a patient, a doctor prescribes glasses with a converging lens having a refractive power of 4D.

a. Is the patient nearsighted or farsighted?

b. If the patient is nearsighted, what is the location of her eye's far point? If she is farsighted, what is the location of her near point?

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