Anatomy of the Eye
Parts of the Eye and How We See. Parts of the Eye Outside the Eyeball. The eye sits in a protective bony socket called the orbit. Six extraocular muscles in the orbit are attached to The Surface of the Eye. The Front of the Eye. The Back of the Eye. 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. Iris: The iris is the colored part of the eye that surrounds the pupil. It. regulates the amount of light that enters the eye. Lens: The lens is a clear part of the eye .
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 how to open country code of iphone 3gs working to the back. The eye sits in a protective bony socket called the orbit. Six extraocular muscles in the orbit are attached to the eye. These muscles move the eye up and down, side to side, and rotate padts eye.
The extraocular muscles are attached to the white part of the eye called the sclera. This is a strong layer of tissue that covers nearly the entire surface of the eyeball.
The surface of the eye and the inner surface of the eyelids are covered with a clear membrane called the conjunctiva. Tears lubricate the eye and are made up of three layers. These three layers together are called the tear film. The mucous layer is made by the conjunctiva. The watery part of the tears is thf by the lacrimal gland. The meibomian gland makes the oil that becomes another part of the tear film.
Tears drain from the eye through the tear duct. Light is focused into the eye through the clear, dome-shaped front portion of the eye called the cornea. Behind the cornea is a fluid-filled space called the anterior chamber. The fluid is called aqueous humor. The eye is always producing aqueous humor. To maintain a constant eye pressurewhat would cause your belly button to bleed humor also drains from the eye in an area called the drainage angle.
Muscles in the iris dilate widen tbe constrict narrow the pupil to control the amount of light reaching the back of the eye. Directly behind the pupil sits the lens. The lens focuses light toward the back of the eye. The lens changes shape to help the eye focus on objects up close. Small fibers called zonules are attached to the capsule holding the lens, suspending it from the eye wall.
The lens is surrounded by the lens capsulewhich is left in place when the lens is removed during cataract surgery. Some types of replacement intraocular lenses go inside the capsule, where the natural lens was. By helping to focus light as it enters the eye, the cornea and the lens both play important roles in giving us clear vision.
The vitreous cavity lies between the ar and the back of the eye. A jellylike substance called vitreous humor fills the cavity. Light that is focused into the eye by the cornea and lens passes through the vitreous onto the retina — the light-sensitive tissue lining the back of the eye.
A tiny but very specialized area of the retina called parst macula is responsible for giving us our detailed, central vision. The other part of the eges, the peripheral retinaprovides us with our peripheral side vision. The retina has special cells called photoreceptors. These cells change light into energy that is transmitted to the brain.
There are arr types of photoreceptors: rods pafts cones. Rods perceive black and white, and enable night dhat. Cones perceive colorand provide central detail vision.
The retina sends light as electrical impulses through the optic nerve to the brain. The wnat nerve is made up of millions of nerve fibers that transmit these impulses to the visual cortex — the part of the brain responsible for our sight. Read an overview of general eye anatomy to learn how the parts of the eye work together. About Foundation Museum of the Eye. Eye Health A-Z. Partes del wht y como vemos. This qre shows eye muscles, which control eye movement. The layers of the tear film keep the front of the eye lubricated.
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Eye Anatomy: Parts of the Eye Outside the Eyeball
13 rows · Pupil. The pupil appears as a black dot in the middle of the eye. This black area is actually a. 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. Iris: The iris is the colored part of the eye that regulates the amount of light entering the eye. Lens: The lens is a . 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. Iris: The iris is the colored part of the eye that regulates the. amount of light entering the eye. Lens: The lens is File Size: KB.
Please understand that our phone lines must be clear for urgent medical care needs. When this changes, we will update this website. Our vaccine supply remains limited. Anterior chamber. The front section of the eye's interior where aqueous humor flows in and out, providing nourishment to the eye. A small, red portion of the corner of the eye that contains modified sebaceous and sweat glands. The thin, blood-rich membrane that lies between the retina and the sclera and is responsible for supplying blood to the outer portion of the retina.
The colored part of the eye. The iris is partly responsible for regulating the amount of light permitted to enter the eye. Lens also called crystalline lens. The transparent structure inside the eye that focuses light rays onto the retina. Lower eyelid.
Skin that covers the lower part of the eyeball, including the cornea, when closed. 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. The opening in the middle of the iris through which light passes to the back of the eye.
The light-sensitive nerve layer that lines the inside of the back of the eye. The retina senses light and creates impulses that are sent through the optic nerve to the brain. The white visible portion of the eyeball. The muscles that move the eyeball are attached to the sclera. Suspensory ligament of lens. A series of fibers that connects the ciliary body of the eye with the lens, holding it in place.
Upper eyelid. Skin that covers the upper part of the eyeball, including the cornea, when closed. Health Home Conditions and Diseases.
Aqueous humor. The clear watery fluid in the front of the eyeball. Blood vessels. Tubes arteries and veins that carry blood to and from the eye. Ciliary body. The part of the eye that produces aqueous humor. The clear, dome-shaped surface that covers the front of the eye. The central portion of the retina that allows us to see fine details.
Posterior chamber. The back part of the eye's interior. Vitreous body. A clear, jelly-like substance that fills the back part of the eye.