The Eye

By. Haruka Matsui

Introduction

This website is writing about structure of eye, how it works and how do we protect our eyes.

Firstly, you have to know that eye is made up with 13 parts.

Those 13 parts are...

  • Posterior chamber

  • Anterior chamber

  • Pupil

  • Lens

  • Cornea

  • Iris

  • Ciliary muscle

  • Conjunctiva

  • Sclera

  • Retina

  • Macula

  • Optic Nerve

  • Vitreous humor

Structure and working of Human Eye

Structure

Posterior chamber

The space in the anterior segment of the eye, filled with aqueous humor. (watery stuff fills the front of the eyeball around the lens)


Anterior chamber

The space in the anterior segment of the eye, filled with aqueous humor.


Pupil

This is the hole in the coloured iris. It lets light into your eye. It gets very small in bright light, and bigger in dull light.


Lens

The lens focuses light onto the retina. It changes shape to make sure that the 'picture' on the retina is as clear as possible.


Cornea

This is the see-through skin that covers the front of your eye. It is clear like glass and it has no blood vessels in it.


Iris

The iris controls the amount of light that enters the eye. The iris is the coloured part of your eye.


Ciliary muscles

These are a circle of tiny muscles around the lens. They change the shape of the lens by squeezing and relaxing. They squeeze it to look at nearby objects, and relax it for far away objects.


Conjunctiva

This is the lining on the inside of your eyelid and the outside of the front of your eye. You can see some tiny blood vessels on the conjunctiva over your eye. If your eyes get sore, these blood vessels get bigger and your eye looks red.


Sclera

This is the tough skin which covers the outside of the eyeball (except for the see-through cornea). We call it the 'white' of the eye.


Retina

This is shows the picture you are seeing. The retina has two lots of cells called 'rods' and 'cones'. Rods can 'see' black and white. Cones can 'see' colours. They turn the picture into an electrical message for the brain.


Macula

A macule is a flat, distinct, colored area of skin that is less than 1 centimeter in diameter.


Optic nerve

The electrical messages from the retina travel along the optic nerve to your brain.


Vitreous humour

This is a thicker jelly-like liquid which fills the larger part of the eyeball and keeps it in shape. (Vitreous means glassy, because the vitreous humour is very clear, so that light can pass through it).

Big image

How the eye works

When we saw the picture, the image is seeing upside down. But then, our brains turn it back to the actual image. So when we see something, it is the right way up.

Game time!

Let's play a game and check your vision!


https://www.igame.com/eye-test/

How to protect your eyes

8 ways to protect our eyes!


  1. Find out if you are at higher risk for eye diseases.

  2. Have regular physical exams to check for diabetes and high blood pressure.

  3. Look for warning signs of changes in your vision.

  4. Exercise more frequently.

  5. Protect your eyes from harmful UV light. (You can try to use UV cut glasses)

  6. Eat a healthy and balanced diet.

  7. Get your eyes checked at least every two years.

  8. Don't smoke. (people who smoke have higher risk of developing age-related macular degeneration, cataracts, uveitis and other eye problems)

Conclusion

Our eyes are made up with many different parts.

When we see something, it is upside down and then, our brains turn it back to the actual image.

There are many ways to protect our eyes.