Saturday, 16 March 2013

The different parts of the eye

Your eyes are very similar to the design of a camera with how they work.

This is interesting fact* 

When you look at an image the image that your eyes see is actually upside down and it is up to your brain to correct this and actually turn the image the correct way up"

To understand how your eyesight works let me explain a bit more about the different parts of the eye and what they actually do:

The Cornea is a see through too let light pass through it and helps to protect your eyes.

This is also a important part of your eye it is the white part of your eye... skin that covers the outside part of your eyeball and is quite tough.

You Iris (the colored bit) is crucial for managing the quantity of light that goes into your eye.

The pupil of your eye is actually a hole that is located in the center of your iris. Pupil often changes size depending on the light conditions you are in.

The lens of the eye
The lens is used to focus light into the retina of your eye. the lens will often also change its size accordingly so that your eye sight is as clear as it can possibly be.

This is kind of where the the image is "displayed" to your brain. Because of how the light has entered onto the retina the image being displayed will be upside down. With rod and cone cells the retina uses these cells to convert the image into electrical messages for your brain to process.

Did you know that*

Rods cells are used to pick up and convert the black and white and the cones cells are used to pick up and then convert the colors of the image.

Blind spot
The blind spot that is found on your retina is a part of you eye that does not process or pick up any light it is instead a part of your eye where the retina is joined to the optic nerve.

Optic nerve
A crucial part of your eye this is where the electrical messages created by the retinas cone and rod cells will travel to your brain. 

Tear glands
It is important that the surface of your eye doesn't dry up so keeping it moist is needed to do this your eyes use tear glands on the side of your eyes to produce moisture for them.

Blinking will spread the moisture produced via the tear glands evenly over the surface of your eyeball.

Conjunctiva lines the inside and also the outside of your eye but the Conjunctiva is not found however on your Cornea as this would obstruct the light.

Aqueous humour
Is the liquid found in your eye and lens.

Vitreous humour
This is a crucial denser type of liquid that gives your eyeball its overall shape and structure.
This liquid makes up the largest proportion of your eyeball.

Eyelids and Eyelashes
Eyelids and Eyelashes are needed to keep light out when you are sleeping and to also constantly circulate the liquid produced from the tear glands around your eye. Also they help to keep dust out and protect your eyes.

Please see my newest post: improve your eye sight with pinhole glasses

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