The Human Eye

(Image to be added soon)

One of the most important senses of the organ is the eye. A wonderful creation of the almighty through which we can see each and everything clearly and not only this we can even remember the same as well. In this article, we will discover a few of the important functions as well as interior and working of the eye.

The eye of a human is a paired sense organ that reacts to light and allows vision as well. The corn and the rod cells in the retina are photoreceptor cells which can detect visible light and convey this information to the brain. The signals which are of the eye's information is used by the brain to elicit the perception of colour and shape and depth and the movement as well and other features also. 

Human Eye

Let’s discuss a few of the external characters of the human eye. Our eye is designed in such a manner that we can look up to 180 degrees and for the matter of facts, many animals can even see upto 360 degrees for example pigeons. A human eye has eyelashes to protect agist any harm and to lock the moisture of the eye. The eye is designed in such a manner that we can see each and everything clearly in the white light. When there is more light then the pupil of the eye decreases and when there is less light the pupil expands in order to get more and more light so that the thing becomes visible. 

The Human Eye Diagram

Our eye is a slight globe which is asymmetrical and about an inch in diameter. The front part that is what  we see in the mirror includes the following:

• The Iris: the part which is the coloured one. 

• The Cornea: a clear dome that is over the iris.

• The Pupil: the black circular opening which is in the iris that lets light in.

• The Sclera: the white part of our eye.

We can see that just behind the iris and pupil lies the lens. This lense which helps to focus light on the back of our eye. We can say that most of the eye is filled with a clear gel known as the vitreous. The project of the light is generally through our pupil and lens to the back of the eye. The retina usually converts light into electrical impulses. That is the behind the eye and our optic nerve that generally carries these impulses to the brain. The macula is the part which is a small extra-sensitive area in the retina that gives us central vision.

The colour of the eye is created by the amount and type of pigment in our iris. There are multiple genes which are inherited from each parent that determine a person’s eye colour.

Anatomy of the Human Eye

• The Orbit

The human eye is generally protected from injury that is mechanical injury by being enclosed in a socket or we can say orbit. This orbit is made up of portions of several of the bones which are of the skull to form a pyramid which is a four-sided pyramid the apex of which points back into the head. Thus we can say that the floor that is of the orbit is made up of parts of the maxilla and zygomatic and palatine bones. while on the other hand, the roof is made up of the orbital plate of the frontal bone and behind this, it is made by the lesser wing of the sphenoid. 

• The Eyelids

It is said to be vitally important that the front surface which is of the eyeball the cornea remains moist. 

General Description of Eye

That is varying among normal individuals by only a millimetre or two. We can say that the sagittal which is vertical diameter is about 24 mm that is said to be about one inch and is usually less than the transverse diameter. We can notice that at birth the sagittal diameter is about 16 to 17 mm which is about 0.65 inches it is said to increase rapidly to about 22.5 to 23 mm that is about 0.89 inch by the age of three years and then between age three and 13 the globe attains its full size.