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| 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. Picture Stats: Views: 349 Filesize: 131.43kB Height: 354 Width: 800 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=39059 |