Question

Guys urgent
:-Explain the working of the eye ​

Answer 1

The iris (the colored portion of the eyethat surrounds the pupil) opens and closes, making the pupil bigger or smaller. This regulates the amount of light passing through. ... These cells in the retina convert the light into electrical impulses. The optic nerve sends these impulses to the brain, which produces an image.

Answer 2

When you look at an object, light reflected from the object enters the eyes through the pupil and is focused through the optical components within the eye.

The front of the eye is made of the cornea, iris, pupil and lens, and focuses

the image onto the retina. The retina is the light sensitive membrane that covers the back of the eye. This membrane consists of millions of nerve cells which gather together behind the eye to form a large nerve called the optic nerve.

When the light enters the eye, it is focused to a pinpoint on the macula, a small area in the centre of the retina at the back of the eye. The macula is responsible for central detailed vision, allowing you to see fine detail and colour, read and recognise faces.

When light stimulates the nerve cells in the retina, messages are sent along the optic nerve to the brain. The optic nerves from the two eyes join inside the brain. The brain uses information from each optic nerve to combine the vision from the two eyes allowing you to see one image.