Helps to change the focal length by holding the lens Provides path for the light to enter the eyesĬontrols the amount of light entering the eyesĪcts like an aperture by dilating and contracting The functions of the different parts of the human are given below: Part Furthermore, it helps to hold the nearly spherical shape of the eye.Īce you Exam Preparation with Entri! Functions of the Human EyeĪs we have studied the structure of the Human Eye, it is important to learn the function that each part performs.
It has a major role in protecting the eye. Vitreous Humour is a gelatinous fluid present between the lens and the retina of the humans. The eye constantly produces a small amount of this fluid. However, it has low protein concentration.
To be precise, it is present between the cornea and the lens of the human eye. Aqueous HumourĪqueous Humour is the transparent, watery fluid present in the front part of the eyes. It is usually paired and cylindrical in nature. Moreover, it is often called as second cranial nerve. They carry the impulses formed by the retina to the brain. The optic nerve connects the human eye to the brain. These are the rod cells and the cone cells. The human eye contains two types of photoreceptor cells. Moreover, it is composed of many layers such as photoreceptor cells. Also, it is located near the optic nerve. Retina is the inner most layer of tissue which lines the human eye. Similarly, cornea and lens of the eye functions as a camera lens whereas the retina acts like a film. In the working of a camera, the camera lens focuses the light onto the film. Furthermore, the Human Eye is usually compared to a camera. Along with the cornea, it helps to refract light and to focus it on retina. The Human Eye has a biconvex, crystalline lens. Get Unlimited Mock Tests On Entri ! Subscribe Today! Internal Elements Lens In short, it is called as the Aperture of the human Eye. Furthermore, it focuses the light onto retina. The major function of pupil is to control the amount of light entering the eye. The pupil is a small opening present in the centre of iris. Apart from all these, it controls the diameter of pupil depending on the amount of light. It does so, by determining the amount of pigment present in iris. In addition, it is made up of connective tissue and muscles that surround the pupil. Iris is the colored, ring shaped membrane of the eye. It does so, by refracting or bending the light ray, with its curved edge. Furthermore, it plays a vital role in vision. Therefore, it serves similar function to sclera. It acts as a protective shield against micro -organism, dirt, etc. The clear, protective layer of the eye is called the cornea. Additionally, it has many small blood vessels which provide nutrients to the eyes and lids. It is made up of loose connective tissue. ConjunctivaĬonjunctiva is a clear, thin membrane which covers the surface of the eyeball. Interestingly, it constitutes more than 80 percent of the surface area of the eye ball. Furthermore, it is the opaque, tough, fibrous and protective layer of the human eye. Sclera is the external white part of the eye. Let us now learn about each part in detail. Also, damage to any one element may cause serious impairments. The table given below shows the External and Internal parts of the human eye: External ElementsĪll the elements of the eye are equally important for its proper functioning.
Human Eye Structure Parts of the Human Eye Internal Elements : the parts of the human eye which cannot be seen externally.External Elements: The parts of the human eye which are visible externally.We shall learn the structure of human eye under two distinguished heads. In addition, it is harbored to the sockets by help of muscles. It is placed in the eye pockets in the skull. Moreover, it is not a perfectly spherical in shape. The Human Eye has a distinctive structure. Then, you will also read about the different functions of the human eye.īe Ahead of All in the Exam Race! Join Entri Today! Structure of the Human Eye In this article, you will read about the structure and parts of the human eye. Most importantly, it enables us to see the beautiful and colorful world around us. Out of this, the Human Eye is regarded as the most sensitive sense organ. This article deals exclusively with the Human Eye- Structure, Parts, Function.Īll the sense organs are valuable and important. This, consequently aid us to perceive and understand the world around us in a better way. The sense organ analogous to each sense help to send information to the brain. Moreover, each one is associated with sight, hearing, smell, taste and touch respectively. They are often called sensory organs and consists of the eyes, ears, nose, tongue and skin. The Human Body has five basic sense organs.
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