It isn't until towards the end of the book when Piggy's glasses are stolen that Piggy looses the mental capacity that he once had. Piggy isn't as reasonable or coherent as he once was. This is best portrayed where Piggy is coming up with a plan to get his glasses back. "Look, I"m going to say, you"re stronger than I am and you haven't got asthma. You can see, I"m goin" to say, and with both eyes. But I don't ask for my glasses back, not as a favor. I don't ask you to be a sport, I"ll say, not because you"re strong, but because what's right's right. Give me my glasses, I"m going to say- you got to! " (171). Here the reader can see that Piggy is rambling on rather than thinking things through. When Brook focuses on Piggy's glasses, he looses the point of them and so do the viewers. The glasses look like they are a toy or an accessory in the movie. The glasses no longer serve their purpose as the intelligence on the island.
Another vital part of the novel is the conch. The conch shell is the symbolic form of leadership on the island. Throughout the novel the conch goes through metamorphosis. At first, the conch is this beautiful shell and as time progresses and the leadership fades from one person to the next, the shell becomes worn and broken until the end of the novel when it is completely destroyed. The readers can see its changes in the book where it describes the physical states of the conch. "In color the shell was deep cream touched here and there with fading pink"(16). "Exposure to the sun had bleached the yellow and pink to near white, and transparency"(78). "The conch exploded into a thousand white fragments and ceased to exist"(187). In Brook's movie, the conch stays the same throughout the whole movie. The shell always looks new and at the end of the movie the viewer never sees it break. Brook could have tried to change the conch by chipping it or breaking it little by little so we could get the idea that as the conch breaks, order breaks.