![]() ![]() It refracts the light entering the eye onto the lens, which then focuses it onto the retina. Cornea: the transparent circular part of the front of the eyeball.Other colours are seen as combinations of these primary colours. It is thought that there are three types of cones, each sensitive to the wavelength of a different primary colour – red, yellow or blue. The human retina contains between six and seven million cones they function best in bright light and are essential for acute vision (receiving a sharp accurate image). Cone cells are the second type of light sensitive cells in the retina of the eye.Also, the ciliary body is made up of muscles that allow the eye to focus at different distances. The aqueous fluid that fills the front of your eye is made inside the ciliary body. The ciliary body is located behind your iris, near the crystalline lens. Ciliary body: the part of the eye that connects the choroid to the iris.Filled with blood vessels, the choroid’s function is to nourish the outer layers of the retina. The choroid is the spongy middle layer of your eye located between the sclera and the retina. It also contains a pigment that absorbs excess light so preventing blurring of vision. Choroid: the middle layer of the eye between the retina and the sclera. ![]() Making approximately 200,000 movements per day, the human eye is able to distinguish around 10 million colours. The vitreous chamber is filled with a thicker fluid called vitreous humour, a transparent gel which is 99% water, which helps the eyes to stay inflated. The anterior and posterior chambers are filled with aqueous humour, which is a watery fluid that provides nourishment to the interior eye structures and helps to keep the eyeball inflated. Vitreous chamber, between the lens and the retina.Posterior chamber, between the iris and the lens.Anterior chamber, between the cornea and iris.The eyeball also contains three chambers of fluid: The inner layer, comprised of the retina.The middle layer, holding the primary blood supply for the eye and containing the iris and pupil.The outer layer, formed by the cornea and sclera.The retina, which is made up by millions of specialised cells known as ‘rods’ and ‘cones’, transforms the image into electrical energy and this is sent to the optic disk on the retina, where it will be transferred via electrical impulses along the optic nerve to be processed by the brain. Just like a lens in a camera sends a message to produce a film the lens in the eye refracts incoming light onto the retina, where messages are encoded. With help from other important structures in the eye, like the iris and cornea, the appropriate amount of light is directed towards the lens. Vision occurs when light enters the eye through the pupil. Although it is small in size, the eye arguably provides us with the most important of the five senses – vision. Posterior Capsule Opacity (Secondary Cataract).Contact Harvard Eye Associates at 94 or to schedule an appointment today. Keep them healthy by maintaining regular vision exams. Our eyes are vital for seeing the world around us. It is mostly water and gives the eye its form and shape. Vitreous Gel: A thick, transparent liquid that fills the center of the eye. It contains millions of photoreceptors (rods and cones) that convert light rays into electrical impulses that are relayed to the brain via the optic nerve. Retina: Light-sensitive tissue that lines the back of the eye. It changes size as the amount of light changes. Pupil: The opening in the center of the iris. Optic Nerve: The nerve that transmits electrical impulses from the retina to the brain. Macula: The small area at the center of the retina responsible for what we see straight in front of us. Lens: A crystalline structure located just behind the iris – it focuses light onto the retina. Iris: The colored part of the eye that controls the amount of light that enters the eye by changing the size of the pupil. Nutrition of the eye is dependent upon blood vessels in the choroid.Ĭiliary Body: the part of the eye that connects the iris to the choroid.Ĭornea: The clear, dome-shaped tissue covering the front of the eye.įovea: A tiny pit located in the macula of the retina that provides the clearest vision of all. Let’s look at a few of the main parts of this vital organ:Īnterior Chamber: The space between the cornea and the iris, filled with the aqueous humor.Ĭhoroid: The vascular layer of the eye, containing connective tissue. It is made up of many distinct parts working in unison together and in order for the eye to work at its best, all parts must work well collectively. The eye is one of the most complex organs in the human body. Posted in Eye Health, Uncategorized | August 5, 2018Įven though the eye is small, only about 1 inch in diameter, it serves a very important function – the sense of sight. ![]()
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