A person needs a lens of power -5.5 dioptres for correcting his distant vision. For correcting his near vision, he needs a lens of power + 1.5 dioptres. What is the focal length of the required for correcting (i) distant vision, and (ii) near vision ?

Explanation

To solve the problem, we need to find the focal lengths of the lenses required for correcting distant and near vision based on their respective powers.

### Step-by-Step Solution:

1. **Understanding the Power of Lenses**:
- The power (P) of a lens is related to its focal length (f) by the formula:
\[
P = \frac{1}{f}
...