Question

State the function of each of the following parts of the human eye:
(i) Cornea
(ii) Iris
(iii) Pupil
(iv) Retina

Answer 1

Here is ur answer :-
(i) Cornea :- Refraction of the light rays falling on the eye.
(ii) Iris :- To control the size of the pupil.
(iii) Pupil :- To regulate and control the amount of light entering the eye.
(iv) Retina:- To act as a screen to obtain the image of an object and generate electrical signals which are sent to the brain via optic nerves.

I hope it helps u dear...........

Answer 2

Cornea - it looks white from outside . its function is sensory and it covers the iris .In humans, the refractive power of the cornea is approximately 43 dioptres.

Iris - iris is the colored portion of eye it is attached to ciliary muscles . it gives color to eye 

Pupil - It is the central portion appeared as black from outside . it is controlled by ciliary muscles it is sensory in day light and twilight 


Retina - it is the innermost layer of eye . it reflects the light and the image forms is inverted so by optic nerves it sees us erect .