Vision Problems: A farsighted person cannot see clearly objects that are closer to her eyes than 60.0 cm. Which one of the following combinations represents the correct focal length and the refractive power of the contact lenses that will enable her to comfortably see the objects at a distance of 25.0 cm from her eyes?
A. -42.9 cm, +2.33 diopters
B. -42.9 cm, -2.33 diopters
C. +42.9 cm, +2.33 diopters
D. +42.9 cm, -2.33 diopters
E. +60 cm, +42.9 diopters
Answer: C
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