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SlideshowReport

The Retinal Image

Description
When we look at an object, the light pattern on the retina is upside down. René Descartes was probably the first person to demonstrate this fact. He cut a piece from the back of an ox’s eye and replaced the piece with paper. When he held the eye up to the light, he saw an upside-down image of the room on the paper. You could take any ordinary lens and get the same result.
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