To solve the problem, we need to recall the standard value for the least distance of distinct vision in a normal human eye.
1. Definition:
The least distance of distinct vision is the minimum distance at which the human eye can see objects clearly without any strain. This is the closest point to the eye at which an object can be brought into sharp focus.
2. Standard Value:
For a normal human eye, the least distance of distinct vision is: $ 25 \, \text{cm} $
Final Answer:
The least distance of distinct vision is $25 \, \text{cm}$