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The near and far point of some person are 11

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The near and far point of some person are 11.1 cm and 21.0 respectively. She got herself the perfect contacts for driving. What is the near point of this person with lens in place? Give answer is cm.

The near point of some person is 103 cm. What power of lens she need to read the screen of computer 39 cm away?

The far point of some person is 14.9 cm. She got herself the lense of -2.9 D. What is the far point of her eye with this lens in place? Give answer in cm.