A person needs a lens of power + 3D for correcting his near vision and -3D for correcting his distant vision. Calculate the focal lengths of the lenses required to correct these defects.

Explanation

To solve the problem, we need to calculate the focal lengths of two lenses based on their powers. The formula we will use is:

\[ \text{Power (P)} = \frac{1}{\text{Focal Length (F)}} \]

Where:
- Power is measured in diopters (D).
- Focal length is measured in meters (m).

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