The least distance of distinct vision for a normal person is

Options

A. 1 m
B. 25 cm
C. 25 m
D. none of these

Answer

### Step-by-Step Solution:

1. **Understanding the Concept**: The least distance of distinct vision refers to the closest distance at which the eye can focus on an object clearly. For a normal person, this distance is important for comfortable vision.

2. **Identifying the Distance**: It is generally accepted that the least distance of distinct vision for a normal human eye is around 25 centimeters. This means that if an object is placed closer than 25 cm, the eye will struggle to focus on it, leading to blurred vision and potential eye strain.

3. **Conclusion**: Therefore, the least distance of distinct vision for a normal person is **25 cm**.