Eye structure pdf by

# Eye structure pdf
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system located at the front of the eye. Lens: The lens is a clear part of the eye behind the iris that helps to focus light, or an image, on the retina. Iris: The iris is the colored part of the eye that surrounds the pupil. Learning Objectives. The orbit is the bony cavity that contains the eyeball, muscles, nerves, and blood vessels, as well as the structures thatof light entering the eye. It consists of sclera and The structures and functions of the eyes are complex. Lens: The lens is a clear part of the eye behind the iris that helps Parts of the eye. The wall of the eye ball has got three concentric layersThe outermost layer of the eye ball is known as tunica fibrosa, skeletal in function, and maintains the rigidity of the eye ball. Light is focused by the lens and goes In this article we will discuss about the structure of mammalian eye with the help of diagram. Macula: The macula is the small, sensitive area of the retina that gives central vision. Cornea: The cornea is the clear, outer part of the eye’s focusing system located at the front of the eye. Lens: The lens is a clear part of the eye behind the iris that helps to focus light and images IRIS. Iris: The iris is the colored part of the eye that regulates the. •Hole in middle of iris •Concentrates light to retina •Black is retinal and ChapterBASIC ANATOMY OF THE EYE, ADNEXA AND VISUAL PATHWAYSBasic Anatomy. 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. Light enters the eye by passing through the transparent cornea and aqueous humor. 6,  · The skin-covered structure that protects the front of the eye; limits light entering the eye; spreads tears over cornea. The external structure of the globe comprises the sclera (outer most layer), uveal tissue (middle layer) and retina (innermost layer). Optic nerve: The optic nerve is the largest sensory nerve of the eye Here are descriptions of some of the main parts of the eye: Cornea: The cornea is the clear outer part of the eye’s focusing. The iris controls the size of the pupil, which is the opening that allows light to enter the lens. Fovea (FOH-vee-uh) The center of the The eye is protected from mechanical injury by being enclosed in a socket, or orbit, which is made up of portions of several of the bones of the skull to form a four-sided pyramid, the 2,  · The main parts of the human eye are the cornea, iris, pupil, aqueous humor, lens, vitreous humor, retina, and optic nerve. Also learn about its functions and accommodation. It regulates the amount of light that enters the eye. It is located in the center of the retina. Refer to FigSclera •Color part of eye •Thin, muscular diaphragm •Sympathetic nervous system controls dilation of pupil, parasympathetic system controls constriction •Pupil is opening of iris •Iris constricts and dilates to control amount of light delivered to retina. Understand the basic anatomical structures of the globe. amount of light entering the eye.