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

Explain the structure and functioning of the human eye. How are we able to see nearby and distant objects ?

Explain the structure and functioning of human eye. How are we able to see nearby as well as distant objects?

How are we able to see a moving picture?

A certain person can see clearly objects at a distnaces btween 20 cm and 250 cm from his eye. What spectacles are required to enable him to see distant objects clearly?

Anil’s uncle cannot see nearby objects clearly, but he can see distant objects clearly. How is it corrected ?