The Human Eye Anatomy

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The Human Eye Anatomy

The Human Eye Anatomy

The Human Eye Anatomy: The human eye is the part of the body that detects light and sends signals to the human brain along with the optic nerve and is one of the most complex organs in the body, the eye is made up of many parts and each individual part is your ability to see.

Cornea

The cornea is transparent skin covering the front of the eye. It is clear and slightly convex. It is the visible-medium part of the eyeball and has no blood vessels.

sclera 

The white part of the front of the eye is called the sclera and its covering that surrounds the cornea is called the conjunctiva. It can also be called an eye protection shield. It protects the eye from external elements and provides lubrication to its eight eyes.

Choroid

The choroid is the middle layer in the anatomy of the eye between the retina and the sclera, which is distinct from the RPE. It is made up of many fine blood vessels, which provide nourishment to the retina and RPE.

Ciliary Body

The ciliary body connects the choroid to the iris

Ciliary Muscles

These are small muscles around the lens that hold the lens in place, but they also play an important role in the way we see. These squeeze or relax to change the shape of the lens. They squeeze and contract, causing the lens to thicken, which enables it to see nearby objects. And these relax, making the lens thinner for distant objects.

Conjunctiva

These are small muscles surrounding the lens. These muscles hold the lens in place, they also play an important role in how we see them. These squeeze or relax to change the shape of the lens. They squeeze and contract, causing the lens to thicken, which enables it to see nearby objects. And these relax, making the lens thinner for distant objects.

Iris

The iris controls how much light will enter our eyes. The iris is the dark part of our eye’s anatomy. It consists of thin circular and longitudinal muscle fibers just behind the cornea.

Lens

The lens is a clear crystalline globe, which focuses light onto the retina. It almost touches the posterior surface of the pupillary opening. Its shape is constantly modified to ensure that the ‘picture’ on the retina is as clear as possible. The ciliary muscles attached to the surface of the laser help the lens to focus.

As the muscles contract, these cause the lens to become more rounded or longer, so that the rays are bent more or less as needed. If the object is far away, the lens needs to bend the rays of light more rapidly so that they can be shot at the center of the retina, where vision is sharpest. For closer objects, the lenses are elongated so that the light rays bend less.

Macula

At the back of the eye structure, there is a yellow spot on the retina that surrounds the fovea. When our eye is directed at an object, the part of the image that is focused on the fovea, the image is most accurately recorded by the brain. It is located in the center of the retina of our eye. It contains the most specialized, light-sensitive nervous system, called photoreceptors, than any other part.

Optic Disk

The visible part of the optic nerve is also found in the retina. The optic disc marks the beginning of the optic nerve where messages from cone and rod cells begin to the eye through nerve fibers in the optic center of the brain. This area is called the ‘blind spot’.

Pupil

This is a hole in the center of the iris. It gives light to our eyes. It shrinks in bright light and expands in low light.

Retina

The work of the retina is similar to that of a film in a camera. This layer is sensitive to light, which makes the inner part of our eye structure glow, and is made up of light-sensitive cells known as rods and cones. There are about 125 million rods in the human eye, which are necessary to see in a dim environment.

The Human Eye Anatomy

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