What does piggy spectacles symbolises in lord of the flies?

Piggy's glasses represent man's intellect and ability to reason. Pay attention to what happens to the glass...how does what happens to the glasses "parallel" what happens to the boys ability and desire to use their intellect and reason?

• Notice: when he cleans the glasses
• Notice: when the glasses flash
• Notice: they use the glasses to start the fire
• Notice: what happens when the glasses get broken
• Notice: what happens when the glasses are stolen
• Notice: what happens when the glasses are completely destroyed