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- How Big Is The eye?
- What Do Eyelids and Eyelashes do?
- What's The sclera?
- What's The cornea?
- What's The Iris?
- What's The pupil?
- What's The Anterior Chamber?
- What's The lens?
- What Does The Retina do?
- What's The Ciliary body?
The eye is about as big as a ping-pong ball and sits in a little hollow area (the eye socket) in the skull.
The eyelid protects the front part of the eye. The lid helps keep the eye clean and moist by opening and shutting several times a minute. This is called blinking, and it's both a voluntary and involuntary action, meaning you can blink whenever you want to, but it also happens without you even thinking about it. The eyelid also has great reflexes, w...
The white part of the eyeball is called the sclera(say: SKLAIR-uh). The sclera is made of a tough material and has the important job of covering most of the eyeball. Think of the sclera as your eyeball's outer coat. Look very closely at the white of the eye, and you'll see lines that look like tiny pink threads. These are blood vessels, the tiny tu...
The cornea(say: KOR-nee-uh), a transparent dome, sits in front of the colored part of the eye. The cornea helps the eye focus as light makes its way through. It is a very important part of the eye, but you can hardly see it because it's made of clear tissue. Like clear glass, the cornea gives your eye a clear window to view the world through.
Behind the cornea are the iris, the pupil, and the anterior chamber. The iris (say: EYE-riss) is the colorful part of the eye. When we say a person has blue eyes, we really mean the person has blue irises! The iris has muscles attached to it that change its shape. This allows the iris to control how much light goes through the pupil(say: PYOO-pul).
The pupil is the black circle in the center of the iris, which is really an opening in the iris, and it lets light enter the eye. To see how this works, use a small flashlight to see how your eyes or a friend's eyes respond to changes in brightness. The pupils will get smaller when the light shines near them and they'll open wider when the light is...
The anterior (say: AN-teer-ee-ur) chamberis the space between the cornea and the iris. This space is filled with a special transparent fluid that nourishes the eye and keeps it healthy.
These next parts are really cool, but you can't see them with just your own eyes! Doctors use special microscopes to look at these inner parts of the eye, such as the lens. After light enters the pupil, it hits the lens. The lens sits behind the iris and is clear and colorless. The lens' job is to focus light rays on the back of the eyeball — a par...
Your retina is in the very back of the eye. It holds millions of cells that are sensitive to light. The retina takes the light the eye receives and changes it into nerve signals so the brain can understand what the eye is seeing.
The lens is suspended in the eye by a bunch of fibers. These fibers are attached to a muscle called the ciliary (say: SIL-ee-air-ee) body. It has the amazing job of changing the shape of the lens. That's right — the lens actually changes shape right inside your eye! Try looking away from your computer and focusing on something way across the room. ...
- A crucial part of your eyes is as flimsy as a wet tissue! A fly darts towards your head! Light bounces off the insect and enters your eye’s cornea, a clear covering over your eye.
- You blink more than 10,000 times a day! Your sight is incredibly important , so your body has ways to protect your eyes. Each eye sits on a cushion of fat, surrounded by protective bone.
- Your eyes adjust in milliseconds to ANY movement of your head! You bounce your eyes around all the time. Even when you’re not running or jumping, your head doesn’t stay still.
- Your eyes see everything upside down and backward! Your eyes are amazing, but the images they send to your brain are a little quirky – they’re upside down, backward and two-dimensional!
The Human Eye. Humans have two eyes. Each eyeball sits in a socket, or opening, in the skull. The skull bone protects the eye on the sides and back. The eyelid protects the front of the eye. By blinking, eyelids also move tears across the eye. Tears keep eyes moist.
Jun 10, 2022 · NEI for Kids. About the Eye. Your eyes are made up of many different parts that work together to help you see. Check out the diagrams below to learn about each part of your eye and what it does. Macula (MACK-yoo-luh) is the small, sensitive area of the retina needed for central vision. It contains the fovea.
