An optometrist has a patient who needs bifocals. The patient can clearly see an object when it is between 36.8 cm and 13.0 m from her eye. Far vision Near vision (a) What power (in diopters) should the far-vision portion of the lens be, so that the woman will be able to see distant objects clearly? diopters (b) What power (in diopters) should the near-vision portion of the lens be, so that she can see objects located 25.0 cm in front of her eye? diopters

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Q: A

A: Near point=13.5 cm=13.5/100=0.135 m Far point=117 cm=117/100=1.17 m

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