How is eye working.

The eye is an important and one of the most complex sensory organs that we humans are endowed with. It helps us in visualizing objects and also helps us in light perception, and depth perception. Besides, these sense organs are pretty much similar to cameras, and they help us see objects when light coming from outside enters them. is the outer covering, a protective tough white layer called the sclera white part of the eye.the front transparent part of the sclera is called the cornea. Light enters the eye through the cornea.

A dark muscular tissue and ring-like structure behind the cornea is known as the iris. the iris actually indicates of the eye. The iris also helps regulate or adjust exposure by adjusting the iris.
A small opening in the iris is known as a pupil. Its size is controlled with the help of iris. It controls the amount of light that enters the eye.
Behind the pupil, there is a transparent structure called a lens. By the action of ciliary muscles, it changes its shape to focus light on the retina. It becomes thinner to focus on distant objects and becomes thicker to focus on the nearby objects.
It is a light-sensitive layer that consists of numerous nerve cells. It converts images formed by the lens into electrical impulses. These electrical impulses are then transmitted to the brain through optic nerves.
Optic nerves are of two types. These include cones and rods.

Cones are the nerve cells that are more sensitive to bright light. They help in detailed central and colour vision.
Rods are the optic nerve cells that are more sensitive to dim lights. They help in peripheral vision.
the junction of the optic nerve and retina, there are no sensory nerve cells. So no vision is possible at that point and is known as a blind spot.

An eye also consists of six muscles. It includes the medial rectus, lateral rectus, superior rectus, inferior rectus, inferior oblique, and superior oblique. The basic function of these muscles is to provide different tensions and torques that further control the movement of the eye.
we mentioned earlier, the eye of a human being is like a camera. Much like the electronic device, the human eye also focuses and lets in light to produce images. So basically, light rays that are deflected from or by distant objects land on the retina after they pass through various mediums like the cornea, crystalline lens, aqueous humor, the lens, and vitreous humor.
different refractive indexes is what bends the rays to form an image. The light rays finally are received and focused on the retina. The retina contains photoreceptor cells called rods and cones and these basically detect the intensity and the frequency of the light. Further, the image that is formed is processed by millions of these cells, and they also relay the signal or nerve impulses to the brain via the optic nerve. The image formed is usually inverted but the brain corrects this phenomenon. This process is also similar to that of a convex len.

the outermost protective parts of the eye. They act as ‘shutters’ and primary barriers against external environment. Boundaries of eyelids are covered by tiny hairline termed as eyelashes.go past eyelids, the next component is the circular frontage of the spherical eyeball, termed as cornea. Cornea is the first optical component of the eye machinery, dealing first-hand with the incoming light. Its function is of a primary filter, before passing on the light to the lens and retina.