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The Eyes

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Basics on the topic The Eyes

The Eye Explained Elementary School

Have you ever taken a closer look at your eyes? Then, you may have discovered that your eyes have a colorful circle with something black inside that changes its size. Learning more about this is really exciting. That's why our eye is also a very popular topic in elementary school. When it comes to learning about the eyes in class, we talk about vision scientifically. Therefore, in this text, you will find answers to the exciting questions ‘How is the human eye structured?’ and ‘How do we see with our eyes?

How is the Eye Structured?

The eye is surrounded by external body parts such as the eyebrow, eyelashes, and eyelid. But, the eye itself also consists of different parts that have unique functions or features:

  • The cornea is on the outside of our eye. It is transparent, so you can't see it.

  • The iris can have different patterns and colors like blue, brown, or green. This is why it is also called the rainbow membrane. Did you know that brown eyes are the most common in the world?

  • The pupil is the black hole located in the center of the rainbow membrane. Here, light enters your eye, which then becomes the image you can see. The pupil can even change its size. When it is dark, you cannot see very well. That's why the pupil becomes very large so that as much light as possible can enter the eye. However, when it is bright, the pupil becomes smaller to prevent too much light from entering the eye.

  • Behind the pupil is the lens.

  • Then, there is the retina and the optic nerve.

In the picture, you can see the eye and its structure depicted for elementary school. By the way, a cross-section fit for elementary school of our eye looks like the second picture.

SEO_27129_27223_The_Eyes.svg

Now you know the components of the human eye and how to label the eye. But how do we see with our eyes? You will find out in the next section.

How Does the Eye Work?

The eye helps us perceive information from the environment – like animals, plants, people, or objects such as buildings, vehicles, or obstacles:

  • Distance
  • Size
  • Color
  • Shape
  • Movement
  • You can determine whether it is light or dark or
  • whether something is sharp or blurry.

To understand how sight works, let's take a look at the different steps:

  • When we see an object, a person, or an animal, light rays are reflected from them. This is called reflection of light rays.
  • The light rays enter the eye through the cornea and the pupil. We need light to be able to see.
  • Behind the pupil is the lens. Here, the incoming light rays are focused further and cross each other. This is why the image is projected onto the retina is upside down.
  • The retina sends the information to the optic nerve, which then transmits it to the brain.
  • In the brain, the information is put together to form the correct image.

This is how vision works, and why the human body can see. A lack of vision is called blindness.

Did you know that many of the components of the eye are not only important for vision, but also have an important protective function?

How Does the Eye Protect Itself?

The eye is a very delicate organ and needs to be well protected. That's why it is located, for example, in the eye socket, a bit deeper in the skull. Additionally, due to its structure, the eye can also protect itself. In the table below, you will find an overview of what protects the eye and helps it function:

Body Parts Protective Function
the eyebrow It keeps sweat and dirt away from the forehead.
the eyelashes They protect against wind and dust.
the tear gland It ensures that the eye is moist and flushes out dirt.
the eyelid It wipes over the eye and protects against things flying into the eye, as well as excessive light.

If you discuss the eye in elementary school during natural science lessons, you already know a lot now. With this knowledge, you can also work on various worksheets about the eye in elementary school.

Frequently Asked Questions about The Eyes

How is the human eye structured?
What parts does our eye have?
What protects the eye?

Transcript The Eyes

Psst, hey you! Have you ever wanted to look at something on a cell phone or tablet at night? But then, when you do, your eyes burn because the screen is blinding. But, why?! It doesn't do that during the day! Let's examine "The Eyes" to find out. The eyes are very important to humans. Let's take a look at what features are found around the eye. There are the eyelashes, which protect the eye from wind and dust and the eyebrow, which keeps sweat and dirt from the forehead out of the eye. The eye sits in the eye socket so that it's better protected. The eyelid is in front of the eye. It opens and closes very quickly, we call this movement blinking. The eyelid can protect the eye from things that try to enter it, or from too much light. It also acts as a windshield wiper, spreading tears and washing the eye with each blink. Now let's talk about the eye itself! What catches our attention is the iris, since it can have many colors and shades like brown, blue, and green. What beautiful color is your iris? Write it in the comments after the video! The pupil is an opening in the center of the iris. That's where the light shines through, which later becomes the image you see. When it's dark, it's hard to see. So, your pupil expands and gets bigger to let in as much light as possible to the eye. When it's bright, your pupil gets smaller so that less light enters your eye, and it is easier to see. You can see this in somebody else, when they close their eyes, and open them again. Their pupil suddenly gets smaller. Try this out at home with family or friends! Now let's see what happens to light when it enters the eye! Behind the pupil is the lens, which focuses the light into a beam. This creates a clear image, just like a projector, that focuses light on a screen or, retina. Our retina passes the image to the optic nerve, which carries the image to the brain like a cable, so that you can see the image instantly! Let's review what we learned about the eye! Surrounding the eye are eyelashes and an eyebrow; both protect the eye. The eye sits in the eye socket and is covered by the eyelid. The iris has a dark opening in the center, called the pupil, which lets light into the eye. In the front of the eye is the lens lining the back of the eye is the retina, which connects to the optic nerve, that sends the image to the brain. So, now do you know why you were blinded by a bright screen in the dark? Your pupil was wide open because it was dark, and you needed as much light as possible to see something. But when the bright screen suddenly appeared, you were blinded. So try darkening the screen and turning on background lighting to relax and enjoy Sofatutor!

3 comments
3 comments
  1. my eyes are orange.

    From Grady, about 1 month ago
  2. my eye is rainbow

    From Jada, 7 months ago
  3. my eye color is brown.

    From Lucas Scott Kerley, 9 months ago

The Eyes exercise

Would you like to apply the knowledge you’ve learned? You can review and practice it with the tasks for the video The Eyes.
  • What do the parts around the eye do?

    Hints

    The eyelid protects the eye from things that try to enter it, or from too much light.

    The eye socket is like a sturdy and strong house for our eyes.

    Solution

    The correct answers are:

    • The eyelashes protect the eye from wind and dust.
    • The eyebrow keeps sweat and dirt from the forehead out of the eye.
    • The eye socket is where the eye sits so that it's better protected.
    • The eyelid protects the eye from things that try to enter it.
  • What are the functions of the different parts of the eye?

    Hints

    When you look at someone's eye, the black part you see is the pupil.

    Behind the pupil is the lens, which focuses the light into a beam.

    Solution

    The correct answers are:

    • The iris can have many colors and shades like brown, blue, and green.
    • The pupil is an opening in the center of the iris.
    • Behind the pupil is the lens, which focuses the light into a beam.
    • Our retina passes the image to the optic nerve.
    • The optic nerve carries the image to the brain.
  • What happens to the light when it enters the eye?

    Hints

    The pupil is an opening in the center of the iris.

    That's where the light shines through, which later becomes the image you see.

    When it's dark, it's hard to see. So, the pupil expands and gets bigger to let in as much light as possible to the eye.

    Behind the pupil is the lens, which focuses the light into a beam.

    This creates a clear image, just like a projector, that focuses light on a screen or retina.

    Our retina passes the image to the optic nerve, which carries the image to the brain.

    Solution

    This is the correct order of the sentences:

    • First, the pupil lets light enter through the eye.
    • Next, the light goes through a lens that focuses the light to make a clear image.
    • Then, a clear image goes to the back of the eye, called the retina.
    • After that, the retina passes the image to the optic nerve, which carries the image to the brain like a cable, so that you can see the image instantly.
    Our eyes work together with our brain to help us enjoy beautiful colors and funny shapes in the world around us!

  • What have you learned about the eyes?

    Hints

    Behind the pupil is the lens, which focuses light to make a clear image, like a projector on a screen or retina.

    The retina passes the image to the optic nerve, which carries the image to the brain like a cable.

    The pupil gets big in the dark to let in more light for seeing.

    Solution

    The correct answers are:

    • The eye is a special organ that helps us to see the world around us.
    • The pupil is the dark part in the center of the eye that lets light in.
    • The light passes through a lens, which makes a clear image.
    • This image goes to the back of the eye called the retina.
    • The retina sends the image to the brain through the optic nerve, so we can see instantly.
    • When it's dark, your pupil gets big to let in more light, helping you see better in low light.
    • But if a bright screen suddenly appears, like on a phone or a computer, it can be too dazzling for your eyes because your pupil is still wide open.
    • To make it more comfortable, you can make the screen darker and have some light in the room.
    • This helps your pupil adjust to the changing light.
  • What are these parts of the eye?

    Hints

    Behind the pupil is the lens, which focuses the light into a beam.

    The retina passes the image to the optic nerve, which carries the image to the brain like a cable.

    Solution

    Behind the pupil is the lens, which focuses the light into a beam.

    This creates a clear image, just like a projector, that focuses light on a screen or retina.

    Our retina passes the image to the optic nerve, which carries the image to the brain.

  • What have you learned about the eyes?

    Hints

    The pupil lets light in.

    The retina sends the image to the brain.

    The lens works like a projector to make a clear image.

    Solution

    The correct answers are:

    • What is the part of the eye that lets light in? The pupil.
    • What part of the eye sends the image to the brain? The retina.
    • What happens to the pupil in bright light? It becomes smaller.
    • What is the part of the eye that works like a projector to make a clear image? The lens.
    • What can you do to take care of your eyes when using devices? Take frequent breaks.
    • What happens to the pupil in dark light? It becomes bigger.