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A nearsighted man uses his ideally prescribed contact lenses that have a refractive power of ?3.80...

A nearsighted man uses his ideally prescribed contact lenses that have a refractive power of ?3.80 diopters. He would like a prescription for eyeglasses. What is the correct eyeglasses prescription if he wears his eyeglasses a distance of 2.20 cm from his eyes?

in diopters

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