Question

How are we able to see nearby and also the distant objects clearly?

Answer 1

this is due to power of accommodation present in our eyes.This ability allows us to manage focal length of our eye to see faraway object as well as nearby object.

Answer 2

This is due to the ability of the eye lens to adjust its focal length which is known as accommodation.

When the ciliary muscles are relaxed, the lens becomes thin. Thus, its focal length increases. This enables us to see distant objects clearly. When we are looking at objects closer to the eye the ciliary muscles contract. This increases the curvature of the eye lens. The eye lens becomes thicker. The focal length of the eye lens decreases. This enables us to see nearby objects clearly.