a For the front part Of the eye is a fairly strong white outer layer, covered with a thin membrane called the “cone”.
The light enters the eye through the cornea. The cornea protects the front of the eye. It also focuses light on the retina at the back. The light passes through the cornea and enters the pupil. It is the circular black part in the middle of the eye. .
Circular part
This part of the ring (iris of the eye) is the one that controls the proportion of light entering the eye, so by opening the iris and combining it allows the iris to get more light in entering the eye when the place is dark and allow for a lower amount of light when the place is illuminating.
The muscle of the eye muscle is the one that controls the size of the pupil which opens or closes the iris.
The eye lenses are located behind the iris of the eye, and the lens of the eye focuses light on the retina to see the objects close to the eye. The ciliary muscle constricts and the lens becomes thicker and therefore stronger.
To see things far from the eye, the same muscle relaxes and the lens becomes louder and weaker. As the age increases, the lens becomes less flexible and less able to be thick, and thus less able to see nearby objects, a condition called senile longitude.
The retina contains special nerves that feel light and blood that nourishes the eye.
The most sensitive areas of the network are an area called a corneal spot, which contains thousands of nerves that stick together at the end.
The more intense these endings are, the clearer the retina will then transfer the visual images to electrical impulses sent to the brain via the optic nerve.
Optic nerve connects the retina of the brain. Half of the nerve fibers travel to the other side to reach the optic crucifixion, an area under the front of the brain. The nerve fibers then gather again before reaching the back of the brain, where the vision is perceived and interpreted.
Eyeball is divided into two sections, each section is filled with fluid.
The front section of the cornea extends to the lens of the eye, and the back extends from the posterior limbs of the lenses to the retina.
the back part
The front part consists of two chambers. The front chamber extends from the cornea to the iris, and the back extends from the iris to the lenses. The eye moisture is excreted in the back chamber, passing through the pupil into the front chamber and then out of the eye through the flow channels on the iris edge.
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