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The Eye

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by

Luka Dakovic

on 23 September 2015

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Transcript of The Eye

The Eye
Identification (outside layer)
The eye is a part of the body that allows you to see. It is almost at the top of your head, just above the nose. The eye has a black part called the pupil, the colourful part is called the iris, the sclera is the white part of the eye. Those are the visible parts of the eye. Another part is called the caruncle the pink or red part of the corner of the eye. There is another part called the cornea it is a transparent layer just outside iris.
As you can see in the picture, there lots of parts in the eye. Like the lens which allows you to see upwards, not upside down. The Retina is a light-sensitive layer that covers approximately 65% of the interior surface. The vitreous is a clear substance in the eye that has a gel like consistency that is 99% made of water. It also keeps the eye round shape, floaters in the eye slowly appear when the vitreous
slowly
shrinks it becomes stringy and the strands make tiny shadows on retina.
What they do
Firstly, light enters through pupil, it lets light into the eye, so if your are in a dark place, the pupil gets bigger so you can see better, but if you are in a lighter room the pupil gets smaller because if all the light went in you would eventually go blind. The iris controls how much light gets into the pupil.

The sclera is a tough opaque protective tissue. It has 6 tiny muscles that allow the eye to move around without falling out! The caruncle is in the corner of the eye. If the caruncle wasn't there we would be crying all the time!
O
p
t
i
c
a
l
illusions
Optical illusions are images or pictures that trick us. The eye sends information to our brain but the brain thinks it does not match reality so when you stare at it moves or looks like some thing else.

Like these- rabbit or duck
Facts
1. The average blink lasts 1/10th of a second
2. You blink 12 times a minute.
3. 80% of vision problems are avoidable even curable.
4. Albert Einstein's eyes remain in a safe box in NYC {New York City}
5. Dolphins sleep with 1 eye open.
6. Cats have 3 eye lids.
7. It's impossible to sneeze with your eyes open.
8. The eye of a giant squid measures to the size of a volleyball.
9. Carrots don't make your eye sight better, the British lied about it to cover up their technology in WWII.
10. Night vision goggles are green because the eye can see more shades of green than any colour.

by Luka Dakovic

Inside the eye
Eye Diseases
There are may types of eye diseases such as cataracts, which makes the lens of your eye blurry allowing you not to see well. But these diseases are avoidable, or even curable. You can avoid these by having regular checkups (once every month). There also is one very rare disease that makes your iris purple it's called
Alexandria's Genesis.
Scientists don't have enough scientific evidence that Alexandrias Genesis is real though. People believe it was dated back 1000 years ago in Egypt when a mysterious light flashed from the sky when everybody was outside. It turned everyone' s skin pale and gave them purple eyes. Many eye diseases have no early side affects. They may be painless you actually might not notice until it is fully advanced.
colour blindness
Colour blindness
To understand what causes colour blindness you need know about the cones in the back of your eye. These cones are tiny cells on your retina with an area the size of a postage stamp.

You have
red
,
blue
and
green
cones which are sensitive to those colours and combinations of them. You need all 3 cells to see colour. But when those cells don't work properly or they're not the right combination your brain doesn't get the right message about which colours you're seeing and gets mixed up.

Colour blindness is almost always comes from your parents when you're born, it is inherited through genes. Genes determine everything about your your body such as, if your tall or short or if your hair is straight or curly. Boys have a much bigger chance of inheriting colour blindness (1/12 actually) because of some chromosome things (very complicated)
Quiz time
1. Why did the British lie about carrots are good for your eyesight?
2. Where do the little cones live in your eye?
3. How many muscles does the sclera have? What do the muscles do?
4. What does Alexandrias' genesis do?

5. How many eyelids do cats have?
6. What colours are the cones in your eye?
7. What are cataracts? clue
videos
Extra- Do you think that Alexandrias' Genesis is real?
fake or real?
find a eye on eye on every slide!
Frederick Hollows {Fred}
Fred Hollows was a
very
famous eye doctor in Australia & New Zealand . He was born in New Zealand in 1929, when he was growing up he always wanted to be a missionary. Fred became a doctor after when someone in his work (he worked in a mental hospital) suggested to him to do a career in medicine. After completing his studies and specializing as an ophthalmologist (eye doctor) Fred moved to Australia.

Within 5 years was the head of the eye department at a leading Sydney hospital. While Fred was in Sydney he became aware of the need for Aboriginal health service and established the first Aboriginal health service. In 2005 there were more than 60 of these health services throughout Australia. Through Fred's work he became aware of the serious health issues battling Aboriginal people-especially trachoma, and other avoidable eye diseases.

for more information go to-
fred/hollows.gov.sa
8. When was Fredrick Hollows born.
Full transcript