An Overview of Eye Anatomy

Light is focused primarily by the cornea - the clear front surface of the eye, which acts like a camera lens. The iris (colored part) of the eye functions like the diaphragm of a camera, controlling the amount of light reaching the retina by automatically adjusting the size of the pupil (aperture). The eye's crystalline lens is located.

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The iris is a flat, thin, ring-shaped structure sticking into the anterior chamber. This is the part that identifies a person's eye colour. The iris contains both circular muscles going around the pupil and radial muscles radiating toward the pupil. When the circular muscles contract, they make the pupil smaller.

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Sclera The sclera is sometimes known as the "whites" of the eye, covering more than 80% of the eyeball's surface.2 The sclera has a smooth and white exterior but is brown on the inside. It has groves that help properly attach the eye tendons to provide stability and protection while staying flexible.

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The main parts of the human eye are the cornea, iris, pupil, aqueous humor, lens, vitreous humor, retina, and optic nerve. Light enters the eye by passing through the transparent cornea and aqueous humor. The iris controls the size of the pupil, which is the opening that allows light to enter the lens. Light is focused by the lens and goes.

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Macula. The central portion of the retina that allows us to see fine details. Optic nerve. A bundle of nerve fibers that connect the retina with the brain. The optic nerve carries signals of light, dark, and colors to a part of the brain called the visual cortex, which assembles the signals into images and produces vision. Posterior chamber.

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Bony cavity within the skull that houses the eye and its associated structures (muscles of the eye, eyelid, periorbital fat, lacrimal apparatus) Bones of the orbit. Maxilla, zygomatic bone, frontal bone, ethmoid bone, lacrimal bone, sphenoid bone and palatine bone. Structure of the eye. Cornea, anterior chamber, lens, vitreous chamber and retina.

Vision and Eye Diagram How We See

Lauren Shavell / Getty Images /AARP. Light reflects off the object we're looking at and enters the eye through the cornea, a clear, thin, dome-shaped tissue at the very front of the eye. The cornea has a curvature to it and covers the eye, kind of like a crystal covering the face of a watch. "When rays of light enter the eye, they're sort of.

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Macula: a yellow spot on the retina at the back of the eye which surrounds the fovea. Fovea: forms a small indentation at the centre of the macula and is the area with the greatest concentration of cone cells.

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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 apex of which points back into the head.

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Eye Anatomy Handout Author: National Eye Institute , National Eye Health Education Program Subject: Diabetes and Healthy Eyes Toolkit and Website Keywords: Eye anatomy, eye diagram, cornea, iris, lens, macula, optic nerve, pupil, retina, vitrous gel, diabetic eye disease. Created Date: 6/27/2012 11:57:40 AM

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Apr. 29, 2023 To understand the diseases and conditions that can affect the eye, it helps to understand basic eye anatomy. Here is a tour of the eye starting from the outside, going in through the front and working to the back. Eye Anatomy: Parts of the Eye Outside the Eyeball The eye sits in a protective bony socket called the orbit.

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Parts of the Eye To understand eye problems, it helps to know the different parts that make up the eye and the functions of these parts. 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 system located at the front of the eye.

How the Human Eye Works (Structure and Function)

Biology of the Eyes / Structure and Function of the Eyes Structure and Function of the Eyes By James Garrity , MD, Mayo Clinic College of Medicine and Science Reviewed/Revised Mar 2022 | Modified Sep 2022 VIEW PROFESSIONAL VERSION The structures and functions of the eyes are complex.

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The Eyes (Human Anatomy): Diagram, Optic Nerve, Iris, Cornea, Pupil, & More Eye Health Reference A Picture of the Eye Medically Reviewed by Whitney Seltman, OD on May 10, 2022 Written by.

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First, light passes through the cornea (the clear front layer of the eye). The cornea is shaped like a dome and bends light to help the eye focus. Some of this light enters the eye through an opening called the pupil (PYOO-pul). The iris (the colored part of the eye) controls how much light the pupil lets in. Next, light passes through the lens.

Human Eye Anatomy Parts of the Eye and Structure of the Human Eye

Selecting or hovering over a box will highlight each area in the diagram. For optimal viewing of this interactive, view at your screen's default zoom setting (100%) and with your browser window view maximised. See the Labelling the eye activity for additional support in using this interactive.