Question

What are the functions of the following---
1---Lens
2--Iris
3-Aqueous humor
4---Vitreous humor.

Answer 1

Lens---The lens, by changing shape, functions to change the focal distance of the eye so that it can focus on objects at various distances, thus allowing a sharp real image of the object of interest to be formed on the retina. This adjustment of the lens is known as accommodation 

Iris--The iris (plural: irides or irises) is a thin, circular structure in the eye, responsible for controlling the diameter and size of the pupil and thus the amount of light reaching the retina. Eye color is defined by that of the iris.

Aqueous humor----The aqueous humour plays an essential role in the health of your eye. As well as nourishing the cornea and the lens by supplying nutrition such as amino acids and glucose, the aqueous humour will: Maintain intraocular pressure. Transport vitamin C in the front segment to act as an antioxidant agent.

Viterous Humor---Vitreous humor. The vitreous humor comprises a large portion of the eyeball. It is a clear gel-like substance that occupies the space behind the lens and in front of the retina at the back of the eye.

Answer 2

Hi.

Here is your answer----

The functions of the given are-----

Lens---- The main function of the lens is to refracts the light and to converge the light on the retina.

Iris--- The iris regulates the amount of light entering the eye.

Aqueous humor---It keeps the lens moist and protects it from mechanical shocks.It also refracts the light.

Vitreous humor---It maintains the shapes of the eyeball. It also refracts the light rays.It also protects the retina and the nerve endings.

Hope this will help u.

Have a nice day.