hoe does the eye work?

Answer 1

The eye is dependant upon light sensitive cells on the surface layer in the inside of the eye called the Retina. They detect and send images to your brain through the optic nerves from each eye and your brain interprets the signals to give you an image of the outside world. The image recieved is focussed on the retina by a bending of light mostly done by the change of light going from being in air to travelling through a liquid in your eyeball. The shape of your eyeball also helps to bend light as well, which is another reason for your eye to be so full of fluid. Fine focussing of light is done by a flexible lens in the eye which helps you to focus on distant and near objects by having its shape changed by muscles pulling on it inside the eye. To regulate the quantity (intensity ) of light hitting the light sensitive cells a set of muscles called the Iris can vary the size of a hole(your pupil) thrugh which the light enters.

Answer 2

You mean HOW does the eye work? A part of the eye is the cornea and at the back of the cornea is a convex lens which refracts light entering it. Refracted light rays emerging from the object meet at the retina. This converging of refracted light rays will cause the formation of a real and inverted image of the object at the retina. However inverted, we don't see things as inverted because the optical nerve transmits these to the brain. The brain will then interpret it as an upright image.

Answer 3

In the front of the eye within the iris is a convex lens.
Reflected light passes through the lens on to the retina that converts the image into signals to the brain which, in turn, converts the signals into an image of the objects in the field of vision.
The light, when it passes through the lens is inverted when it arrives at the retina, the brain returns the images back to the normal view, (otherwise, everything would be upside-down).

The iris opens wider when light is low and closes down when bright light enters the eye.

(That's as simple as I can make it).

Answer 4

anything that you look at reflects an image at the back of the eye, (inside). this reflection hits the optic nerves at the back of the eye and the brain is able to process these nerve impulses and turn them into a picture. although, evrything you see is upside down and reversed by the brain.
in a way, the back of the eye works in the same way as photograph film, reacting to light.

Answer 5

see

Answer 6

Try this - bit too complicated for me though;
http://en.wikipedia.org/wiki/Eyes