Question

State the function of the following parts of the eye:
(i) Iris .............................................................................................................
(ii) Ciliary muscles..........................................................................................
(iii) Pupil ..........................................................................................................
(iv) Vitreous humour .......................................................................................
(v) Retina .......................................................................................................

Answer 1

Answer:

here is answer

Explanation:

1.irisi regulates the pupil which controls the amount of light entering the eye.

iris is coloured diaphragm while pupil appears black because no light is reflected back from it.

2.The ciliary muscle is located in the eye and surrounds the lens. It contracts or relaxes in order for an individual to see at multiple distances. When it contracts, it pulls forward, moving to a frontal portion to relax the fibers that hold the lens in place; this process also allows it to take on a more spherical shape to provide short range focus

3.It regulates the amount of light that enters the eye.

The pupil is the hole that lets light enter the inner eye.

4.Vitreous humour is the gel like substance present between lens and retina of eye. Its functions are:

It maintains shape of the eye.

It maintains internal pressure that prevents eyeball from collapsing.

It keeps retina in place by pressing it against choroid.

Hope this information will clear your doubts about the vitreous humour.

5.The retina is important for capturing light rays and converting them into electrical impulses, which are eventually turned into images that the brain can comprehend. The retina is made of numerous photoreceptors that help in this process.

Answer 2

Functions of different parts of the eye

Iris:

• It controls the amount of light entering into the eye by controlling the size of the pupil.

Ciliary muscles:

• They alter the shape of the lens.
• The contraction of ciliary muscles results in spherical shape of the lens, whereas the relaxation results in the flattened shaped lens.

Pupil:

• It is the point through which light enters the eyes.

Vitreous humor:

• It helps in maintaining the shape of the eyeball.
• It also acts as support to both the lens as well as retina.

Retina:

• It is the site where image is formed in the eye.
• The image formed at retina is inverted.

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