CBSE BOARD X, asked by nivedagasper, 1 year ago

Explain the working of human eye step by step


nivedagasper: Plz send the working of all parts step by step as the light enters
nivedagasper: its a 5mrk question

Answers

Answered by vasantinikam2004
1

Please mark as brain list...

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vasantinikam2004: Please mark my answer as brainlist...
vasantinikam2004: please mark as brainlist...
nivedagasper: I can mark only if two people answer the question not for one
nivedagasper: The option is not available for one
vasantinikam2004: ok
nivedagasper: I want the full working
nivedagasper: the pupil,lens....
Answered by madyasha904
1

Human eye is a natural optical instrument which is used to see the objects by human being. It mainly consider of 7parts

1. Retina-it is a light sensitive screen inside the eye on which image is formed. Contains rod cells and cones cells.

2.cornea -it is a thin membrane which covers the eye ball. It acts like a lens which refracts the light entering the eye.

3.eye lens- it is a convex lens made of transparent and flexible jelly like materials.

4.pupil-it is a hole in the middle of iris through which light enters the eye.

5.ciliary muscles -these are the muscles which are attached to the eye lens and can modify the shape of eye lens which leads to the variation in focal lengths.

6.iris-it control the amount of light entering the eye by changing the size of pupil

7.optical nerve -these are the nerve which take this image to the brain in the form of electrical signal.

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