Structure Of Human Eye And Its Functions

It is muscular pigmented and opaque diaphragm which hangs in the eye ball in front of lens. The main parts of the human eye are the cornea iris pupil aqueous humor lens vitreous humor retina and optic nerve.

Eye Anatomy Functions And Structure Eye Anatomy Senses Anatomy

Eyes are animal organs that are specialized for sight.

Structure of human eye and its functions. Table of Contents. The iris or colored part of the eye surrounds the pupil. Behind the eye your optic nerve carries.

The structure of the eye is an important topic to understand as it one of the important sensory organs in the human body. It has small circular opening called pupil. The inside lining of the eye is covered by special light-sensing cells that are collectively called the retina.

The basic function of these muscles is to provide different tensions and torques that further control the movement of the eye. The iris is the area of the eye that contains the pigment which gives the eye its color. The Accessory Structures of the Eye.

An eye also consists of six muscles. The outermost layer or the fibrous tunic consists of the cornea and sclera. There are several physical and chemical elements that make up the eye.

The eye receives light from the outside world and. The main function of cornea is to properly focus on light. In the process of visualizing an object the light rays fall on that object.

The movement of these muscles control the size of pupil. It includes the medial rectus lateral rectus superior rectus inferior rectus inferior oblique and superior oblique. The eye has many parts that must work together to produce clear vision.

The eye works much the same as a camera. The sclera or white part of the eye protects the eyeball. Our eyes are the doorway to the external environment and clearly the most important of the sense organs.

Circular and radial muscle. Cross section of the human eye A horizontal cross section of the human eye showing the major parts of the eye including the protective covering of the cornea over the front of the eye. The cornea and the lens help to focus the light rays onto the back of the eye retina.

Light enters the eye by passing through the transparent cornea and aqueous humor. This article gives you information on the parts of the human eye its functions and the working strategy of the eye as a whole. Each eye constantly adjusts the amount of light it lets in focuses on objects near and far and produces continuous images that are instantly transmitted to the brain.

This lies right behind the cornea. There are many other layers of cornea that provide more protection. They play a pivotal role in our day-to-day existence.

It functions as an automatic camera shutter controlling the amount of light entering a human eye. The pupil or black dot at the center of the eye is a hole through which light can enter the eye. Its function is to change the shape of lens by contraction or relaxation of muscle.

The eye is linked together with the nervous system which allows the brain to take in information from the eyes and make the appropriate decisions on how to act upon this information. The cells in the retina absorb and convert the light to electrochemical impulses which are transferred along the optic nerve and then to the brain. In the middle layer we have the vascular tunic or uvea consisting of the choroid ciliary body and the iris.

The human eye facts reveal that it is very complex in terms of both structure and function. It is mainly responsible for vision differentiation of colour the human eye can differentiate approximately 10 12 million colours and maintaining the biological clock of the human body. Gift of the Creator Gives us the sense of sight 70 of all sensory receptors are in the eye Spheroid structure about 23 the size of aping-pong ball Functions.

It converts light into electrical impulses. It controls the circular opening called the pupil aperture. Structure and function of eye 1.

Light is focused by the lens and goes through. This allows the eye to take in more or less light depending on how bright it is around you. Moving further on the innermost layer is the retina.

This area surrounds the pupil and uses the dilator pupillae muscles to widen or close the pupil. The structure of eye comprises three coats within which further are three transparent structures. It has two types of muscles.

Human eye in humans specialized sense organ capable of receiving visual images which are then carried to the brain. Parts of the Eye and Their Functions. Passing through different parts of the eye the light rays reach the retina.

The dome-shaped layer protects human eye from elements against entering in the inner parts of the eye. After reflecting from there they enter the eye. The cornea is the outer layer covering of the eye.

The lens further focuses the light rays entering our eyes. Distinguishes light and darkshape colour brightness distance ofobjects. The orbit is the bony cavity that contains the eyeball muscles nerves and blood vessels as well as the structures that produce and drain tears.

These include the eyebrows the eyelids and eyelashes the conjunctiva and the lacrimal apparatus. These may be as simple as proteins or cells which can tell light from darkness like the eyes found in many microorganisms or they may be complex assemblies of lenses filters light-sensitive tissues nerves and support structures. The human eye can be compared to a camera as both work by gathering focusing and transmitting the light through the lens for creating an image of an object.

The iris controls the size of the pupil which is the opening that allows light to enter the lens.

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