. Write the function of each of the following parts of human eye

cornea; iris; crystalline lens;  ciliary muscles


Best Answer

Ans. Functions of the following parts of human eye:

(i) Cornea. The front part of the eye is called cornea. It is made up of a transparent substance. The light coming from objects enters the eye through cornea.

(ii) Iris. This is a flat, coloured, ring-shaped membrane behind the cornea. a hole in the  middle of the iris. Iris controls the size of the pupil.

(iii)  Crystalline lens. Eye lens is a convex lens which focuses the image of the on the retina.

(iv) Ciliary muscles. Ciliary muscles hold the eye lens and changes the this eye-lens while focussing.

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