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How are images formed in the retina?

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The retina is the thin light-sensitive membrane lining the inner eyeball- towards the back of the eye. When light goes into your eye it must pass through the lens (a biconvex lens) which inverts the image you are seeing- Basically- when you look at an image, let's say an apple, light bounces off the apple into your eye- as it enters your eye and passes through the lens the image gets inverted- reversed and flipped the other way- so that the image on your retina looks like an upside down apple going from right to left instead of left to right. Once this image is set on the retina, cone cells distinguish the color and detail while rod cells distinguish movement and shades of grey. The retina is connected to a nerve called the optic nerve- the image gets sent from the optic nerve to the occipital lobe in the brain where the image gets flipped and inverted once again to the proper image of the apple you first saw- and is finally interpreted.
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What does the retina do?

The retina receives the image seen through your eye, only in reverse up to down. It transmits this image through the optical nerve and your brain returns the inverted image to

What part of the eye focuses light on the retina producing an image?

The lens. And apparently the cornea also. Please see http://wiki.answers.com/Q/What_part_of_the_eye_focuses_light_to_form_an_image_to_the_retina for a more complete answer. It

Is the image formed on your retina real or virtual?

real

Where is the retina?

  The retina is in the back of your eye. In your eye.

What focuses the image on the retina?

The thing that focuses the retina is the pupil. the light rays pass through the cornea into the pupil while passing through a cavity which contains a jelly-like liquid called