The first studies of perception happened in the years 460-371 BC by the Greek philosopher Democritus. He believed the shapes we see were pictures which flew to our eyes, where our soul would then recognize them. The philosopher Plato (427- 348 BC) later came up with a new idea, he believed the eyes worked by first making light and then scanning the world. Another Greek philosopher and student of Plato called Aristotle (384 to 322 BC) did not agree with these ideas. He presented a new theory : 