Ideas about how our eyes work have undergone many changes throughout history. In ancient Greece, for example, Plato’s “emission theory” suggested that we emit beams of light from our eyes in order to illuminate and see objects. Another Greek, Empedocles, believed that Aphrodite made the human eye out of the four elements — fire, air, earth, and water. She then made sight possible by lighting the fire in the eye and allowing it to shine out. In most parts of the world, such…
Read moreDebunking the most common eye myths
13:30 Joseph Pennington