Question

write the function of each of the following part of human eyes. cornea. iris. crystalline lens. ciliary muscles ..? answers

Answer 1

1. cornea - it provides 67 % of eye's focusing power.
2. Iris - It controles the size of the pupil.
3. Crystalline lens - it is the central part of the eye that faciliates the image formation.
4. Cilliary Muscles- They hold the lens in position and help in modifying the curvature of the lens.
5. Retina - It is the light sensitive part of the eye on which image is formed. it captures the light rays formed by the lens and sends impulses to the brain via optic nerve.
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Answer 2

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