Question

Explain the function of main parts of an eye by drawing a simple sketch of it.Write answer of the given question.

Answer 1

Hope it helps.....!!!

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The following table lists the main parts of the human eye and their respective functions.

1) Pupil:
=> Opens and closes in order to regulate and control the amount of light.


2) Iris:
=> Controls light level similar to the aperture of a camera.


3) Sclera:
=> Protective outer coat


4)Cornea:
=> Thin membrane which provides 67% of the eye’s focusing power.


5) Crystalline lens:
=> Helps to focus light into the retina.


6) Conjunctiva:
=> Covers the outer surface (visible part) of the eye


7) Aqueous humour:
=> Provides power to the cornea


8) Vitreous humour:
=>Provides the eye its form and shape


9) Retina:
=> Captures the light rays focussed by the lens and sends impulses to the brain via optic nerve


10) Optic nerve:
=> Transmits electrical signals to the brain


11) Ciliary muscles:
=> Contracts and extends in order to change the lens shape for focusing.

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Answer 2

hey there here is your answer

human eye is the sensitive sense organ of human body.
it enables us to see the wonderful colourful world.

functions of main parts of eye

1.cornea -
Courtney is the transparent bulging surface of the eyeball. it provides surface area for light entering into the eye

2. iris
behind the cornea the structure is called iris.

3. pupil
the centrally located colour part is called pupil.
it adjust its size to control the amount of light entering into the eye

4. lens
the human eye lens is a double convex lens called as crystalline lens. it helps in focusing the light passing through it on the retina.

5 retina
it is a thin delicate membrane having enormous amount of light sensitive cells and colour sensitive cells.
the colour sensitive cells are called cones which enable us to see the different colours
the light sensitive cells are called rods which enable us to see the brighter object.

6. blind spot
the region of the eye where the optic nerve emerge to the brain is called blind spot

7. optic nerve
the north which connects to the Brain are called optic nerve.
the optic nerve communicate the message from eye to brain in the form of electrical signals

8. cilliary muscles
the ciliary muscle hold the lens from both the side. by contraction and relaxation it adjust the size of lens

hope it helps u mate