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Explain the structure and functioning of Human eye. How are we able to see nearby as well as distant objects?
 
Match the functions of the Human eye:
Answer variants:
Centre of the Iris
Hold the eye lens in place
Eye's back surface
Coloured portion of the eye
Front surface of the eyeball
Column A
Column B
1. Cornea
2. Iris
3. Ciliary muscles
4. Pupil
5. Retina
 
Our eyes can change the  of the lens and hence it can focus on the images from help in changing the focal length of the lens.