![]() The vascular layer of the eye, known as the choroid contains the connective tissue. The anterior chamber of the eye is the space between the cornea and the iris and is filled with a lubricating fluid, aqueous humour. Contact The Eye Clinic Surgicenter at 40 or to schedule an appointment today. A brief description of the eye along with a well-labelled diagram is given below for reference. 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. Photograph of the retina of the human eye, with overlay diagrams showing the positions and sizes of the macula, fovea, and optic disc Anatomical macula / macula lutea / area centralis (clinical: posterior pole ): Diameter 5.5mm (3.5 disc-diameters) (about 18 deg of VF) Demarcated by the superior and inferior temporal arterial arcades. 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. A schematic section through the human eye with a schematic enlargement of the retina The retina is approximately 0.5 mm thick and lines the back of the eye. Optic Nerve: The nerve that transmits electrical impulses from the retina to the brain. The total retina is a circular disc of between 30 and 40 mm in diameter (Polyak, 1941 Van Buren, 1963 Kolb, 1991). 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. The entire retina contains about 7 million cones and 75 to 150 million rods. 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. In adult humans, the entire retina is about 72 of a sphere about 22 mm in diameter. The eye is one of the most complex organs in the human body. The retina is a thin layer of tissue that lines the back of the eye on the inside. Use the DOWNLOAD EXERCISE button for a PDF version of this interactive.Even though the eye is small, only about 1 inch in diameter, it serves a very important function – the sense of sight. See the Labelling the eye activity for additional support in using this interactive. The optics of the eye create an image of the visual world on the retina, which serves much the same function as the film in a camera. Selecting or hovering over a box will highlight each area in the diagram.įor optimal viewing of this interactive, view at your screen’s default zoom setting (100%) and with your browser window view maximised. Use ‘Reset all’ to practise again from the start. The purpose of the retina is to receive light that the lens has focused. When you are happy with your selection, use the ‘Check answers’ button to check them. The retina is a thin layer of tissue that lines the back of the eye on the inside. Labelling a diagram of the structure of the human eye AND Annotation of a diagram of the retina to show the cell types and the direction in which light. If you want to check your answers, use the ‘Reset incorrect’ button. If you want to redo an answer, click on the box and the answer will go back to the top so you can move it to another box. Drag and drop the text labels onto the boxes next to the eye diagram There are no photoreceptors (i.e. Use your mouse or finger to hover over a box to highlight the part to be named. blind spot, small portion of the visual field of each eye that corresponds to the position of the optic disk (also known as the optic nerve head) within the retina. In this interactive, you can label parts of the human eye. ![]() This stimulates the visual centres in the brain, giving us the sensation of seeing. These pictures help your eye doctor to find, watch and treat disease. With fundus photography, a special fundus camera points through the pupil to the back of the eye and takes pictures. It is made up of the retina, macula, optic disc, fovea and blood vessels. The human eye has several structures that enable entering light energy to be converted to electrochemical energy. The fundus is the inside, back surface of the eye. ![]()
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