Question

The least distance of distinct vision for a young adult with normal vision is about

• A. $25m$
• B. $2.5cm$
• C. $25cm$
• D. $2.5m$

Answer 1

The correct option is C

$25cm$

Power of accommodation:

1. It is defined as the ability of the eye lens to focus on near or far objects by adjusting the focal length.
2. Our eyes have a convex lens and can adjust the focal length up to a certain limit.
3. This is because the ciliary muscles in the eye have a limit to contract, any object placed beyond that point appears blurred.
4. Young adults with normal vision will have this power of accommodation value of $25cm$.

Hence, the correct answer is option C