Piggy's glasses absolutely represent knowledge and intelligence. Piggy is undeniably the most sensible and learned boy on the island in Lord of the Flies, and his suggestions and reasoning are usually sound. Unfortunately, Piggy is not taken seriously, primarily because of his size, asthma and superior intelligence. The glasses also represent the scientific advancements of the modern world the boys have left behind: In addition to improving Piggy's eyesight, they also serve as the source of fire, since the lenses can provide a flame when reflected by the sun. The glasses also represent the boys' best chance of survival, the source for both the signal fire and a way to cook the wild pigs which the boys hunt. The glasses are eventually broken and then stolen from Piggy, but they remain a valuable possession when they end up in Jack's hands.