Exercise One: Sight

SIGHT
Miriam , Kristen and Iliana

The eye works in a similar procedure as a camera. Light bounces off objects and into our eyes. Light goes through a
CORNEA
The transparent part at the front of the eye through which light passes, called the cornea.
IRIS
Behind the cornea is a round barrier, called the iris. It is different colours depending on the person.
PUPIL
A hole in the centre of the iris, called the pupil. Light passes through the hole to get into the eye. The pupil size changes according to the amount of light.
FOCUS
When an object is viewed in focus it will cause a clear, sharp image. While an object which is out of focus is blurry and is not seen in detail.
LENS
It is a transparent disk located behind the pupil, called the lens. The lens is connected to the eye with muscles, which causes it to change shape vaguely. Therefore it can change according to the distance between the eye and the object to keep the image in focus.
RETINA
Light beams reach the lining at the back of the eye, which is the retina. It acts just like film in a camera.
OPTIC NERVE
The light beams which have fallen on the retina are turned into electrical nerve signals, which travel down the optic nerve towards the brain.


RESOURCES
Text: http://jim.leeder.users.btopenworld.com/LHON/eye.htm
Image: http://www.spec2000.net/images/eyeball.jpg